Apparently someone is going to be making them. It will be close to $300 but slightly less. Not available until Feb 15 2012.
JU 82209208
Chrysler Crossfire (2005-2008) Rear Fascia Accent Panels - 2pc
Price: $ 249.95
Shipping: $ 15.95
Coming as of 15 Feb 2012
Description:</B> Designed specifically for the Crossfire. Black fiberglass and paintable rear accent panels, set of two.
Includes mounting clips. Looks and fits exactly like the factory part that is no longer made. Same hardware for fastening.
2 week delivery time via US Priority mail