Marcus Glarner in Canada also does the CSL front spoiler (had one on my CSL/very high quality piece).
The rear spoiler pictured here is an original with the rubber lip. Zaprace make a nice repro but the rubber piece is molded in.
I have a Zaprace (rear spoiler and a set of bubble flares) available if you decide that what you're looking for. Zaprace fiberglass products are very high quality.
Regards- Richard