Let us know how those Rock Auto 10" rear drums work out for your ride, as a number of members are running the factory Abody 8.75" rear with the 10" drums out back.
The 10" Wagner drums from Rock Auto worked out great. It was a helluva job since nothing on the brakes had been touched since the early 70's. Turns out I was pretty close to death judging by the wear/warping and rust we found.
I did manage to find a guy in Long Island, NY who claims to have the last stock of NOS 10" brake drums in his warehouse. Says he bought all of them from the company when they went out of business 15-20 years ago. He gets $125 each for them and sounds like he's got a lot of hard to find stuff. Get at me directly if you want his contact info as he doesn't own a computer (seriously).