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.
2016 Hyper Blue Metallic 2SS
NPP, Auto, Nav, Ash Grey Interior
1100 Status - 12/08/15