8 3/4 SBP brake options

Finally have the Cuda up and running with the new 340 engine, and need to start sourcing parts for the 8 3/4 swap. Through my research, I'm seeing post on the inability to find new10 inch SBP brake drums. Bad news for me, if this is true. Car currently has Power drum brakes with small bolt pattern Cragars that I recently bought and a 7 1/4 rear end.
So what are my options? Can the 7 1/4 parts be swapped onto the 8 3/4...backing plates, drums etc.
Any help would be appreciated. Larry