You might want to check in with a couple of the local techs and get some refs from them:
1) Willie Whittaker, NBS Electronics, 230 South Broadway, Denver, CO, 80209-1510, 303-778-1156. Specializing in tube amplifiers, Fender in particular. Because of the enormous volume of work I have, I'm SLOW - so if you need it yesterday, I'll be glad to give you a phone number for another local tech. De-modding and un-hacking services available. Over 40 years experience. Tons of tubes, speakers and repair parts in stock. Note that I do *not* do re-Tolexing, grille cloth, or cabinetry - this ain't no beauty parlor. I'm amp tech for Derek Trucks, and I built the amps he uses with the Allmans. 'Nuff said. ;-)
2) In Denver I found that Noel at Stubbyfex is pretty good. Very honest work, fair pricing, and overall good to deal with.
Note: Sourced from:
http://www.talkbass.com/forum/f15/good-amp-techs-519922-post7046092/