Source for 10in small pattern 8 3/4 drums???

I too have thought of using a front drum on the rear. It looks like if you cut off the lip, it might fit the narrower shoes. That would be easier on a drum that has a single lip. The center register hole should be the same since the wheels use it and interchange front to rear. I haven't tried this since it seems a hassle to have to machine a wear item like a drum, plus removing the lip might affect the strength and cause it to crack, though seems unlikely.

Mine is a 7.25" rear. I don't know if 8.75" rears use different drums. I know for some factory setups, you need special rear drums with a bell shape.