I have a 1946 chev fire truck that I am restoring.( big bolt ) I put all new linning and wheel cylinders on. I found these parts at a brake supply that has been in the business for at least fifty yrs. They had no problem to get me new wheel cylinders. I took the old linning into the place and they resurfaced or rebonded new linning on the oringal shoes.
Be prepared though to pay the price.
I also rebuilt the master cylinder for a fraction of the cost of a rebuilt or new on. I think I pd. somthing like fifteen dollars for the kit. This was avalible at the auto parts supply store.
Jim Carter also has the parts but at a inflated price.