I put new brakes on my '52 3600 a while ago. After exhausting all other possible sources I got the rear shoes from Jim Carter's. I had to send in my cores...I believe they reline them in house.
I upgraded my front brakes to Bendix from a '53. Much better parts availability and they are 12" as well.
Your '52 front brake parts will be the same as an early 1/2 ton
with Huck brakes except for the drums. Pre-'51 I believe.
Yes, the sizes you listed are standard for your truck.
