bouymaker, I got to their website through a "where to buy" on TSM's webpage (
https://www.tsmmfg.net/chevy-gmc-8-lug-truck-complete-front-disc-brake-kit-1847.html) but they also have limited contact information. When I did send a question via email I got a very timely response that was clearly not computer generated so that seemed positive.
I agree that they are probably using standard GM parts (although probably not GM sourced) and suspect that they do not include that information in part because they want to sell the complete kit, not just the brackets. If at the end of the day I buy their kits I am anticipating that they would provide service parts information but I would plan to confirm that prior to purchasing.
