Send the wheel off to Wheels of America and for a small price (around $130) they will fix it good as new...I've used them in the past and they do excellent work (of course you will have to do without your wheel for about a week)...or you can buy another wheel from Chevrolet, still send the damaged wheel off to get fixed and then keep it as a spare...because you'll never know when you'll do it again. I have a spare for Bullitt wheel for my Mustang (just in case).
http://www.wheelsamerica.com/