I got the spoiler from Brad at
www.neverenoughauto.com
I think he lists it at $US210 painted or $US135 nonpainted. I picked it up from him last weekend in Detroit when we were at the Auto Show. Cost me $245CDN with the US/CDN $ conversion.
Took about an hour to install. Not difficult. You remove the OEM valance above the rear window, take into the house where it is warm and the carpet floor is easy to work on. You do have to drill a hole in the OEM valance for the nozzle to fit properly and the hose is a little stretched but it works fine so far.
IMHO, this spoiler looks best on lowered trixes, gives it that solid on the ground appearance whereas the OEM sky hook one looks good on the OEM raised suspension trixes.