I've always had great luck with this company:
Valley Friction
11817 Sherman Way, North Hollywood, CA 91605
(818) 765-5174
Not to be confused with other companies of the same name, this is a small company employing only about ten people and started in 1973. I have no relation to them, but I have used them for brake parts for my entire life. Seems like I mostly only work on vehicles of the 50's and 40's.
Three yeas ago, the last time I went there they had, in stock, the master cylinder and hydrovac power unit I needed for my '64 International Loadstar. They must have about a dozen
Shelves of brake and clutch part catalogs. I'm just very impressed with their old school approach to parts. For example, need a wheel bearing nut socket ... no problem, they have, in stock, every size from small car to large 8-point semi-truck and construction equipment sizes. If they can't get you the brake parts you need, I don't believe you will find them new anywhere. They also reline shoes and make hydraulic lines.
That being said, there are several companies that will reline your wheel cylinders and master cylinder with a stainless steel insert. There is also one or two companies I've found using google search that will reline brake drums, but I've never used them so I have no idea how expensive they are.
And as a last resort, get a parts catalog usually available on eBay if not available from
https://www.ihpartsamerica.com (they recently bought out Binder Books) and do google searches using the part numbers. (Don't use dashes or spaces when doing google part number searches). I recently bought a new old stock Warn locking hub for my old Loadstar from an industrial electrical equipment surplus company. They had it listed for years as a Jeep locking hub but by the part number I knew it wasn't for a Jeep, but rather for my old Loadstar.
I hope this is of some help to people looking for old brake parts.
BTW, Warn does NOT support any of their locking hubs that are not in current production. If anyone knows of any company with a new old stock Warn locking hub or parts, IH part numbers - 501-157-C91 - or - 501-157-C92 - or - 506-591-C91 - or - 506-591-C92 - or - 506-592-C91 - or - 506-592-C92, please let me know.
Thank you, and sorry for the thread hijack.
Good luck.