For anyone else thinking about buying a chin spoiler out there:
Yes, they went up in price - higher demand?
Best bet (I did this) call your Ford dealer. Part 3R3Z17626AAA, they may call it a "lower valance". No shipping, no folding, about $110. Plus you get the OEM part for your car! Comes in a box, they guarantee no scratches! I opened it up right there and checked it. If they're any good they can hook you up with the x-mas tree pop rivets, otherwise get 'em at Autozone or Ebay.
Be careful of any other spoiler, there are cheap imitations out there!
Two good links for installing:
http://www.fordmuscle.com/archives/2004/07/Project01GT/
http://mustanglife.tenmagazines.com/mygallery.ten?id=3715&album=7397
Just tape the spoiler to the car, start at one end do the other, work toward the middle. Took me about 20 minutes, looks perfect!