Hi Hockley,
Welcome to TBN, Im sure you will find this forum very informative on many topics.
Im not sure what to say about your gear problems. At one point I was looking for clutch parts for my MF1040. I ended up getting a response from Hufner Farm & Garden in Torrington,Ct. Tel 860-482-8109. You might try them if your close to Ct. If not have you called your local Massey dealer?
Might be worth a call, and they could steer you in the right direction.
scotty