Like it was posted before there was a BMW M3 that went through a similar situation...
http://www.motortopia.com/blogs/view...s_man_gets_car
In short, guy wins car at a good price, dealer refuses to sell, guy goes public on a bmw forums. The story gets passed around to multiple sites. I think one guy even offered free legal representation for him. He got the car with some minor conditions (simple things to keep the dealer's reputation in tact).