Billy when I did the brakes on the 9" for my El Camino, I was able to source all the parts I needed new for just a few bucks from a "REAL" parts store.

Basically we looked up a car with the same diameter shoes (In my case a 64 Ford full size) and ordered the spring and self adjuster kits. The only 2 pieces I had to get from a donor were the transfer bar (The bar that goes between the 2 shoes at the top) and the lever that connects to the rear shoe and the cable attaches to).