Just go to americanmuscle.com
I get all my stuff from them. They have a nice black billet overlay and brushed aluminum. Problem is, it's an overlay. No one makes a quality grille replacement for the 2011-12 so they only stock the overlay. But, you can take a dremel tool and cut out the current grill (just not the outside that the overlay attaches to) and it looks like the GT replacements.