CMS-GT4
Active member
Its been done, and it does not look good. The closest thing that is supra style that looks decent is the Savage supra style spoiler. It was made to fit the 185 hatch better, which is why it might look decent.
http://www.toyotacelicaonline.com/celica1/b5savage.htm
http://www.toyotacelicaonline.com/celica1/b5savage.htm