I got mine from NR Auto, it is poly and fits very nice.
http://986forum.com/forums/attachment.php?attachmentid=6165
http://986forum.com/forums/attachment.php?attachmentid=6069
I do not plan on adding side-skirts since the very bottom is black and I don't think it messes with the lines too much. It does scrape a few more curbs than before, but no damage as of yet, and being poly it doesn't crack. I have had it for about 4 months.
test image