I just got an excal a few months back. www.destructivecustoms.com
still is one of the best AKA techs in the country. He sells after market parts, boards, triggers you name it. Jarrod rocks. He might even have some of the Rob Town valves left over, raise your stock shots per tank from 2000 of a 68/4500 to 2500 off a 68/4500. I know they were doing another run of the valves a few months back, there was a thread on AO about it.
This reminds me, gotta send my excal back in for some loving, popped a small leak.