Look in the back of minitruck magazines. Sometimes you'll find kits to embed supra tails into a rollpan on a truck, and it usually comes in a kit including the rollpan, the taillights, and the metal part that the taillights bolt into. I'd say start there. Usually these kits run a couple hundred bucks and it's probably less hassle than trying to find tails and/or a junked supra to cut the mounting area off of.