I've been looking for the decal for my 83 supra today and have had no luck. I found the large supra decal for the 84 and 85 models but I really don't want to put that on there. These are a couple of pics I have found of the decal, found on an ebay auction of an 83 supra in mint condition (I don't have 6k nor the money to fly to west virginia to get the car.)
hxxp://pics.apartment808.com/users/scorpmatt/car4.jpg
hxxp://pics.apartment808.com/users/scorpmatt/car16.jpg
replace the x's with t's.