Hi JB,
Presumeably you are located in the US rather than the UK ?
Most MF 100 series tractors used the same steering wheel between models, same for the MF 1000/1005 series.
If you are close to a local Agco Dealer, you could ask them to pull up their tractor parts database, and compare the same item between models, as one can do with hard copy parts books, just to prove the point.
MF 760/860 combines have same steering wheel as MF 1000/1005 tractors, including the 1080/1085 models.
There is a firm in the UK that refurbishes tractor steering wheels but if you're US based, that's a bit of a long shot I guess.