http://www.autometer.com/cat_gaugelist.aspx?sid=4&opid=4&szid=2
Depends on which one you want, there's 3 different Vacuum/Boost gauges to choose from, depending on boost levels.
Towards the middle of Summit Racings catalog they have a few pages with nothing but Autometer gauges, so you could compare prices.
But in 2 1/16th? It doesn't look like autometer makes one in the Cobalt series.. I would assume that the gauge configuration you're
using is only compatable with that size?