CGM is too hard to come by from my experience. I just opted to buy a new one and get it painted. Luckly I was able to trade my tuning services for the body work. You may want to look into purchasing a new OEM one, they run about $270 and then paint depends on the shop. Good luck.
Good Luck man. Only reason why I found this to be the better choice (straight up trade) is because you are both getting what you want, and its MUCH easier then finding some RS owner that wants to pay out of pocket for a large wing.
I was actually able to get one from my body guy one day later (I suppose from some local dealer) and tuned his car while he painted the next day. If your willing to travel to VA hypnotik on nabisco is the man for the job.