Have you checked out
http://www.proclipusa.com/ ?
Here's my proclip setup. (though I don't think my particular mount is compatible with 2012+ newer Camaros due to the leather trim on the dash.)
I have the Garmin 50LM that I bought for $100 on sale. Lifetime maps for free and works awesome! The proclip ran me around $60 I believe.