IMO, there's not much point in building a relationship with a shop that far away.
Instead, I'd buy either from Deep6gear.com or one of the shops with a national footprint through their
web store that have a solid mail in service department like scuba.com (formerly leisurepro.com), scubatoys.com or diverightinscuba.com. If you have a local independent that sells Edge HOG regs, that would work too.
Parts availability for self servicing can be tricky in the US. All of the major manufacturers restrict parts sales to consumers. I have had to buy Mares parts from Italy (BTW, I've had good luck with these guys
MARES REGULATORS ). You can find original or aftermarket service kits for a few of the classic regs some of which are still being sold new, for example from
Regulator Service Kits .
The major exceptions are Deep6 and Edge HOG. Both offer service kits and self service courses, although you might need to travel for them. Hog parts can be purchased by anyone. Last I heard (you should confirm with them before purchasing) Deep6 wants to see that you are trained to service diaphragm regs before they will send you a kit, either through one of their courses or something similar such as the HOG course or
@rsingler 's comprehensive online course.
You have time either way. Pretty much all new regs have 2 year service intervals.