First of all, you would probably have better luck in the 5th Gen section.
Second of all, we cannot have a pillar mount because of the side curtain airbag and where it deploys from, behind the A pillar.
Third, nothing looks perfectly factory. A few have put some gauges in the cubby under the radio, a few of us turbo guys have put a boost gauge either in the factory accessory location or elsewhere like I have.
But seriously, try the 5th Gen section, guys will be happy to share pics with you I am sure.
Here is my boost gauge setup, with more to come in the cubby location.