I'm not sure if this guy is still producing these, but have you see the Smokey? It's a kit that includes different wings, hatch and fiberglass cowl. Very nice looking and the wings are plug and play...you can switch between the Smokey wings and the stock wings whenever you choose. Pretty neat.

[link=http://rowleycorvette.com/smokey/]http://rowleycorvette.com/smokey/[/link]