This site has a bunch of sponsors. I would start there. I bought my 2011 from one of the sponsors, bought wheels and tires from another one. In many cases, if you PM the sponsor, they will send you a special discount code that will give you a better price, too. Just go to the Marketplace Forum and you can find areas for each sponsor. Go to their specific forum and you'll be able to PM their rep.
2011 GT Premium Convertible Automatic = Received 05/28/10.
-Tinted windows and all lamps (6/2010); Aftermarket speakers, amps, and 12" sub (7/2010); Staggered 20" wheels and tires (7/2010); Magnaflow axle-back (8/2010); SCT/Bama Custom Tune (8/2010); Sport rotors (8/2010); Pushbutton ignition and keyless entry (11/2010); Supercharger (7/2011)