Good question, and good luck. None of the vendors with whom I have spoken offers an A-pillar mount for the SRT. I find the A-pillar location convenient for boost and EGT data during aggressive driving situations. Less distracting than looking down at the dashboard, IMO. I also checked with Autometer and found that they do not offer an A-pillar mount for our cars.
You may want to consider (or at least be aware of) suction cup windshield mounts. This is what they look like on ViperD's car:
Interestingly, Dodge does make an A-pillar mount for the SRT 10 Ram, where it houses an oil temp gauge. I purchased one for my Ram diesel, to mount a single boost/EGT combo gauge.
Be sure to post if you find something.
TD