Imaging Science Foundation has a website that will list certified calibrators in your area. Also, there is a segment of ISF Techs that "tour" around the US and regionally. One such group is AVLion. Prices vary, but I would expect to pay $400-$500 average depending on the display type, number of inputs calibrated and whether they do more than just calibrate the greyscale or not. If you using a touring tech, then also expect to pay a portion of traveling expenses (spilt between you and the others who are getting calibrations in your city).
If you still can't find a certified tech in the ISF website, then call the local dealers and they may have someone on staff....but be prepared that they may not do calibrations for projectors or sets, unless you bought the projector from them.
PS: I'd also run a general search through all forums using "ISF" as your search word
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