Don, I'm really glad you got off with only a warning, and as terrible as it sounds, I'm glad that flying piece of metal hit your car, and it didn't come crashing thru your side window and strike you. It's bad enough it damaged your car, but we don't want to lose any forum members. (We need your Dues)!
Just take it to the best body shop you know of and hopefully they can match your paint. If you get it back, and it doesn't match to your liking, have them paint the whole side of your car. Good Luck.