You know, ACE, I did this 25 years ago when I started teaching; maybe protocol has changed since.
I taught at Laguna Sea Sports, and asked the shop manager, and the owner, respectively, for the contact info for the different manufacturers I was interested in (Scubapro, Oceanic, and Sherwood,) I got course info, took a half to 1 day seminar each, and was certified as a repair tech.
I was able to order rebuild kits through the shop as needed.
Pretty simple, really.
Let me know how it is for you.
ASW