Welcome. I'm guessing you're riding a R75/5?
If so, you can always check with Glen at Flying Squirrel Motorcycle. He has/had an old airhead when I was last down there. He is always a good source for old parts etc., honest guy and good prices.
388 Carlaw Ave #102d Toronto, ON M4M 2X6
(416) 889-8769
Check the ADV site under old school and there is an airhead section that may have some shops out oakville/hamilton way. I think there may be some tech days as well floating around this time of year, assuming you can ride it there.
There are always a few shade tree mechanics that like to work on airheads, maybe some on this board?
You could always call Budd's....
Good luck.