Jack's Small Engines has it for $172.65.
1690422 - 6116, 16HP Tractor
1690436 - 6116, 16HP Tractor and 48" ...
1690437 - 816GT, 16HP Gear
1690439 - Lift Lever Kit
1690448 - 6111, 11HP Tractor
1690449 - 6111, 11HP Tractor and 42" ...
1690450 - 6108, 8HP Tractor
1690451 - 6108, 8HP Tractor and 36" R...
1690452 - 811GT II, 11HP Gear
1690454 - 808GT II, 8HP Gear
1690469 - 6116, 16HP Tractor and 42" ...
1690595 - 6108, 8HP Tractor TRACTOR ONLY
1690596 - 6111, 11HP Tractor TRACTOR ...
1690597 - 6116, 16HP Tractor TRACTOR ...
1690598 - 6118, 18HP Tractor
1690599 - 818GT, 18HP 3-Speed
1690600 - 6118, 18HP Tractor TRACTOR ...
1690601 - 6118, 18HP Tractor and 42" ...
1690602 - 6118, 18HP Tractor and 48" ...
1690603 - 818GT, 18HP 3-Speed and 42"...
1690604 - 818GT, 18HP 3-Speed and 48"...
1690613 - 6108, 8HP Tractor TRACTOR ONLY
1690614 - 6111, 11HP Tractor TRACTOR ...
1690615 - 6116, 16HP Tractor TRACTOR ...
1690616 - 6118, 18HP Tractor TRACTOR ...
1690622 - 818GT, 18HP 3-Speed TRACTOR...
1690682 - 6211, 11HP Tractor w/Turf T...
1690683 - 6211, 11HP Tractor w/Turf T...
1690686 - T-811, 11HP Gear
1690687 - 6216, 16HP Tractor w/Turf T...
1690688 - 6216, 16HP Tractor w/Turf T...
1690689 - 6216, 16HP Tractor w/Turf T...
1690692 - T-816, 16HP Gear
1690694 - 6218, 18HP Tractor w/Turf T...
1690695 - 6218, 18HP Tractor w/Turf T...
1690698 - T-818, 18HP Gear
1690701 - 6211, 11HP Tractor w/Turf T...
1690702 - 6216, 16HP Tractor w/Turf T...
1690703 - 6218, 18HP Tractor w/Turf T...
1690732 - 6211, 11HP Tractor w/Ag Tir...
1690733 - 6211, 11HP Tractor w/Ag Tir...
1690734 - 6216, 16HP Tractor w/Ag Tir...
1690735 - 6216, 16HP Tractor w/Ag Tir...
1690736 - 6216, 16HP Tractor w/Ag Tir...
1690737 - 6218, 18HP Tractor w/Ag Tir...
1690738 - 6218, 18HP Tractor w/Ag Tir...
1690755 - 6211, 11HP Tractor w/Ag Tires
1690756 - 6216, 16HP Tractor w/Ag Tires
1690757 - 6218, 18HP Tractor w/Ag Tires
1690786 - 6211, 11HP Tractor w/Turf T...
1690787 - 6211, 11HP Tractor w/Ag Tires
1690788 - 6211, 11HP Tractor w/Turf T...
1690789 - 6211, 11HP Tractor w/Ag Tir...
1690790 - 6211, 11HP Tractor w/Turf T...
1690791 - 6211, 11HP Tractor w/Ag Tir...
1690792 - T-811, 11HP Gear
1690793 - T-811, 11HP Gear TRACTOR ONLY
1690794 - T-811, 11HP Gear and 42" Mo...
1690927 - 6211H, 11HP Tractor/Turf Tires
1690928 - 6211H, 11HP Tractor/Turf Ti...
1690929 - 6211H, 11HP Tractor/Turf Ti...
1690930 - 6216, 16HP Tractor/Turf Tires
1690931 - 6216, 16HP Tractor/Turf Tir...
1690932 - 6216, 16HP Tractor/Turf Tir...
1690933 - 6216, 16HP Tractor/Turf Tir...
1690962 - T-811, 11HP Gear
1690965 - T-816, 16HP Gear
1691034 - 6211, 11HP Gear
1691035 - 6216, 16HP Gear
1691045 - T-811, 11HP Gear
1691046 - T-816, 16HP Gear
1691061 - 6211, 11HP Gear TRACTOR ONLY
1691062 - 6211, 11HP Gear and 42" Mow...
1691063 - 6216, 16HP Gear TRACTOR ONLY
1691064 - 6216, 16HP Gear and 42" Mow...
1691065 - 6216, 16HP Gear and 48" Mow...
1691226 - 6212.5, 12.5HP Gear and 42"...
1691240 - 6212.5, 12.5HP Gear
1691241 - T-813, 13HP Gear
1691263 - 6516H, 16HP Hydro
1691298 - 6212.5, 12.5HP Gear TRACTOR...
1691467 - Lift Lever, Front Mount Att...
1691468 - 6512.5H, 12.5HP Hydro
1691470 - 1813H, 12.5HP Hydro
1691471 - 1816H, 16HP Hydro
1691491 - 6512.5H, 12.5HP Hydro TRACT...
1691492 - 6512.5H, 12.5HP Hydro and 4...
1691493 - 6516H, 16HP Hydro TRACTOR ONLY
1691494 - 6516H, 16HP Hydro and 42" M...
1691495 - 6516H, 16HP Hydro and 48" M...
1691507 - 1813H, 12.5HP Hydro TRACTOR...
1691508 - 1813H, 12.5HP Hydro and 42"...
1691509 - 1816H, 16HP Hydro TRACTOR ONLY
1691510 - 1816H, 16HP Hydro and 42" M...
1691511 - 1816H, 16HP Hydro and 48" M...
1691549 - 1814H, 14HP Hydro and 42" M...
1691560 - 1814H, 14HP Hydro
1691561 - 1814H, 14HP Hydro TRACTOR ONLY
1691624 - 6512.5H, 12.5HP Hydro (CE/E...
1691625 - 6512.5H, 12.5HP Hydro and 4...
1691626 - 6516H, 16HP Hydro (CE/Export)
1691627 - 6516H, 16HP Hydro and 42" M...
1691628 - 6516H, 16HP Hydro w/48" Mow...
1691644 - 6516H, 16HP Hydro - French
1691645 - 6516H, 16HP Hydro - French ...
1691646 - 6516H, 16HP Hydro - French
1691647 - 6516H, 16HP Hydro - French ...
1691652 - 6516H, 16HP Hydro w/48" Mower
1691682 - 1817H, 17HP Hydro
1691698 - 6516H, 16HP Hydro w/48" Mow...
1691713 - 1817H, 17HP Hydro and 48" M...
1691714 - 1817H, 17HP Hydro TRACTOR ONLY
1691732 - 6517H, 17HP Hydro
1691733 - 6517H, 17HP Hydro and 48" M...
1691734 - 6517H, 17HP Hydro TRACTOR ONLY
1691762 - 6516H, 16HP Hydro - French ...
1691766 - GTH, 16HP Hydro
1691769 - 1816H, 16HP Hydro
1691770 - 1816H, 16HP Hydro and 42" M...
1691771 - 1816H, 16HP Hydro and 48" M...
1691772 - GTH, 16HP Hydro and 42" Mow...
1691773 - GTH, 16HP Hydro and 48" Mow...
1691786 - GTH, 16HP Hydro TRACTOR ONLY
1691787 - 1816H, 16HP Hydro TRACTOR ONLY
1691824 - GTH 17HP, Hydro
1691825 - GTH 17HP, Hydro TRACTOR ONLY
1691826 - GTH 17HP, Hydro and 48" Mow...
71691045 - T-811, 11HP Gear
71691046 - T-816, 16HP Gear
71691241 - T-813, 13HP Gear
You will notice it lists basically all the 62xx's and 65xx's. So if the mysterious long lift lever (that was an accessory for the 52xx and 42xx machines) is in fact just the factory lever from the 62xx and 65xx, then I guess I found it. Problem is the picture from CL from that 65xx does not look the same. Maybe I need more data points.