I don't know anything specific but have you tried going to the Cobb website and checking their official tuner page? I know when I was looking to get my wifes '08 GTI tuned the tuners were up in the Phoenix area. I know it's a long drive on a crappy I-10 but it might be worth it.
Also right before we moved to Vegas there was a tuning shop that opened up on the South side of Rita Ranch... Not sure if he has a dyno or anything I just barely stuck my head in before we moved.
For mechanics, I only used Micro Imports for my Nissan Xterra and my wifes GTI and they were great everytime Tucson Auto Repair - Home | Micro Import Service