While I was looking at misc parts and stuff on ebay, I saw several wrecked GTs in Wisconsin where they were selling parts off them. They would have one part listed like an AC compressor or something, but show a picture of the wrecked Vibe GT it came from. Might be worth a call and maybe you could get most of the parts from a place fairly close by. Also, look on
http://www.car-part.com for GT wheels or rear bumpers which are specific to the GT models. This place seems to have a lot of GTs, they have like 3 rear bumpers listed. Morrison's Auto Inc USA-WI(Edgerton) Request_Quote 1-800-866-2277 Edit: I just found one of the ebay auctions I saw, it is the same place in WI.
http://www.ebay.com/itm/380367...p=mtrYou will have a hard time finding them in silver, and even if you do get them, most likely they will need repairs and a repaint.Good luck!