I am thinking 25 bucks plus shipping in its "raw" state and you cut and trim to fit to your liking...

I too like the vent gauges, but to me they seem a little out of place and in the air vent...not that this wouldn't look out of place, but at least it is a home for the gauges...the ashtray works too, and I use that also, but not for gauges that change quickly, or that you don't want your eye to wander too far to see...

to each their own
Jake