1974 john deere 600 parts

[Wisniewski08]

Hello,
I am starting a project of restoring our family snowmobile, 1974 John Deere 600. Been in the family since late 70's. I am searching for some parts which seem to be the hardest ones to locate. Any help with finding these parts or any suggestions on other places to look would be greatly appreciated in the process of getting it back on the snow.
The pieces that I am searching for as of now are the backrest, the seat ( the mice have completely destroyed the seat foam and cover), and a track, (we used this sled for trapping in the early 1980s and 1990s and got caught up on a buried stump ripping off a side section of the track). This sled has the 18 inch wide track which seems to be a bear to find.
Again any help, hints, or suggestions would be a big help.
Thank you,
Michael

[buckeyetrailfire]

get ahold of Brock Weber 740-808-1296 he might be able to help