I do have one AD that is super anal about parts. They have an authorized service guy on site, and pretty much all parts orders go through him. I got a set of end links out of him once, but he was incredibly difficult to convince and very uncomfortable handing them over without seeing the watch. Then another well-known jewelry store who is also an AD, but without on-site service, was willing to take my money for just about anything. All transactions went through the regular sales floor associates there.