There is always Stan Warren (Supermods) in Oregon who will also be busy.
Then there is Dan Wright (Modwright) at http://www.modwright.com
Also Channel Islands Mods (Dusty Vawter)
For power supplies, other tweeks, and repairs of vintage gear there is Bill Thalmann at Music Technology. Bill is a former Conrad Johnson engineer, so is a great choice for CJ and similar
gear....http://www.musictechnology.com/