First time I've seen OEM style body parts for sale. Check out this CF R wing...
http://www.ebay.com/itm/Shelby-GT350R-Style-Carbon-Fiber-Rear-Trunk-Spoiler-Wing-For-Ford-Mustang-2015-/161876562516?hash=item25b0985254:g:UN0AAOSwYHxWNsjr&vxp=mtr
It's from China so who knows what you're getting but I can only imagine what a true OEM wing will cost.
http://www.ebay.com/itm/Shelby-GT350R-Style-Carbon-Fiber-Rear-Trunk-Spoiler-Wing-For-Ford-Mustang-2015-/161876562516?hash=item25b0985254:g:UN0AAOSwYHxWNsjr&vxp=mtr
It's from China so who knows what you're getting but I can only imagine what a true OEM wing will cost.