Eaton drum brake question

[Hobbs81]

Sorry if this has been covered, I couldn't find much. I have a 68 c-20 and need to rehab the rear brakes. As nobody seems to carry these brake cylinders, what do people do? Brothers sells a rebuild kit for the cylinders I think, but I'd rather have new. What about sources for shoes and spring / hardware? Considering how many of these beasts are out there you would think simple wear parts would be available... 🤔