Don't shoot me for saying this, but why not try Maaco. Those guys shoot paint all day long and many will tell you its all in the prep. Looks like you have done a lot. I would think they could spray it relatively cheap for you. However, the only question is if they will spray the exact color or paint you want them to for the price. Your other option is to do it yourself. You could also call around a couple trade schools. When I took a night auto paint class they were looking for smaller projects like that to demonstrate the proper way to paint a car without actually having to paint a full car which would take longer than the alotted time they had to teach. Call around, you never know what may happen.