Take a look at these:
For cal and repair Protos and many others
Certified (paper certificate) is extra as is cleaning, repair, etc.
Try your local airport maintenance facility. they can usually give you a lead on a calibration service. They are suppose to have theirs certified (paper cert) every year.
For the really up tight:
S, J.R. Brown
2000 G500 LWB Obsedian Black
2005 Toyota Tacoma Access Cab Off Road Sport
1993 Volvo 240 Sedan Anthracite
1980 450SEL Champange (owned it for 15 years. Great car)
1986 280GE LWB Anthracite (Sold it and kinda wish I hadn't)