If all else fails, you can install a rivet in two places on the plate for each shoe. This would create stick out, flat, rub pads. Use a steel "flat" head solid rivet similar to McMaster Carr 97032A371. Cut to length and smash it on.
No machine shop needed, just a drill, saw and a hammer.
The no.1 answer is a good donor plate.

Here is a guy in our area https://phoenix.craigslist.org/evl/pts/d/1947-to-1954-chevrolet-1-2/6529115203.html
Maybe he will sell the brake stuff or you can buy the whole rear end and sell the rest? Better hurry, posted yesterday

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn