In California I've had good experience with Man-A-Fre, they did a great job installing my suspension, bumper, winch, and some other stuff.
Gary Kardum (Mudrak) has spent a bunch of time on the phone answering questions for me, and more time chatting with me in person, despite the fact that I've never been able to give him any business (yet).
For Body work in San Diego, California there is nobody I would recommend more enthusiastically than Joel DeLara at Eurotek - take a look at
www.sandcruiser.com/spons.html for his address.
While I'm at it- Mike at RockSolid in Hemet, CA treated us well. The bumper he made for us is too stout if anything, but I asked for indestructible and he delivered. He also let us use his yard for some modifcations and that was critical for our situation at the time, not everyone is that nice.