AdobePhil,
not sure if you were still searching something out, but I found a Utah dealer that does uprev tuning. Its importautoclinic located in Layton. I havnet been in contact with the shop as I dont even have my Z yet, its being shipped. But it will be good to have a location here that can tune.
Import Auto Clinic 801.546.1229 - Import Specialist & General Auto Repair