I highly recommend John Monaghan as he has worked on several jets for me. He's a great builder who offers reasonable prices.

John Monaghan
The Aeroplane Factory
8587 Comming Hwy
Canton Ga 30115
334-728-1499

Another good contact is Kilroy Richardson in Texas. Although I have never contracted him to do any work for me, I know him personally and I have seen his work and he does a great job and he has a stellar reputation.