you could always pick up a set of regular cavalier tails from a junkyard or somewhere really cheap to make your molds and do the body work off of... that way you wont drop the cash on the real deal until you have something that works. (i'm assuming that they are real CF and will be expensive)

~Ryan 1999 T-Red SVT Contour 41k Miles #1701 / 2760 B&M, Custom Y-Pipe, Alpine HU, Pioneer 6x8's & 6x9's