[66 Barracuda] Sources for Brake Parts?

Hey All!
Im having a bit of trouble locating Drums and Shoes for my dads car. I searched here before posting and checked out all the popular spots. (RockAuto, Ebay, Classic Industries)

This has 10" Drums

Im going to replace both rear axle seals soon and want to replace the old tired brakes while im there.

Has anyone come across any special spot that carries these drums?

Thanks so much
Matt