Thanks for all the good feedback. I have some leads to follow now.There was a 'Kit' which is showing as NLA (No Longer Available).
#BM16544
You may find a New Old Stock pack in a dealership somewhere. Maybe ask your dealer to do a Parts Search ?
The notes say:
"KIT CAN ONLY BE USED ON TRACTORS EQUIPPED WITH SELECTIVE CONTROL VALVES"
It may be possible to purchase all the components individually:
That's the hydraulic parts.
This is the Rockshaft & lift arms set you'll need also: