I found them on ebay as a take off from an 06 S. I think I got a great deal, they were $2k with new tires shipped to my door in Tx. I still have my old 17's, I would like to sell them. I was going to post here later today - $500.
Here are some pics of the old rims and tires. Let me know if youre interested.
http://gallery.scott-and-sara.com/gallery/album15/DSC01106
http://gallery.scott-and-sara.com/gallery/album15/DSC01107
http://gallery.scott-and-sara.com/gallery/album15/DSC01111