8 3/4 axle shaft seals

The steel shim/gasket that goes between the backing plate and axle flange is available from Fel-Pro. Part #55032. I ordered mine thru Murrays Auto Parts which is now O'Reilly's. When I took my 8-3/4 apart there were 2 or 3 gaskets on each side. They looked pretty crappy that is why I replaced them. Hope this helps.