Try this: It's for the 14 bolt, but has the same bolt pattern as the earlier axles.

http://www.quad4x4.com/product/30010/QU30010-73-91-AXLE-FLG-GASKET/


1954 3600 Chevy Truck
"The Fake Truck"
In the Stovebolt Gallery
More pix on Photobucket