[oletrucks] Differential cover gasket

["Hanlon, Bill" <Bill.Hanlon@COMPAQ.com>]

Anyone know where I can find a gasket for the differential cover on my
57 GMC (NOT CHEVY) with the standard Spicer 45 rear end?  The GM part #
for the gasket is 2346829.  It is no longer available from GMC and I
have struck out at two FLAPS.  I could always fall back to silicon goop
or make my own from cork, but thought I'd check with the OleTruckers
first.
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959