Just a little word-of-mouth on a company I've had some success with:

CMM Technology 1-800-648-6944
For a flat fee of $655, they cleaned & calibrated our DCC B&S MicroXcel PFx in about four hours. No charge for travel.
The technician, Dave Harvey in this area, was very knowledgeable about the mechanics & electronics, the software (PC-DMIS), and various other machines and software packages.

I recommend them highly.