Are your brake linings bonded or riveted to the shoes? I have a shoe riveting machine if you can find the proper linings. There are usually lots of them on Ebay, and the right rivets, at very reasonable prices. On some of the really big rigs (18 wheeler size) the brake blocks are simply bolted to the shoes with pan head screws, with self-locking nuts on the back side. A commercial machine shop with a big lathe and a tool post grinder should be able to clean up your drums.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!