I found this one
http://www.amazon.com/86-92-Supra-7M.../dp/B0040GYYD4
The description is this..
Turbo + Downpipe Upgrade Hardware Kit for 86-92 Toyota Supra MK3 with 7MGTE Turbo Engine.Bolt On Fit, CXRACING's NEWLY Released Turbo kit, Fully Tested. This turbo is an Upgrade to Stock CT26 Turbo, but Keeps the Stock Manifold and Stock MAF, bolt on Upgrade, Good for 350~400 HP.This kit is very simple and easy to install, almost no need to relocate any other parts, Bolt on fitment. It is the best Solution to upgrade your Supra without doing major changes. We do offer another Aftermarket Turbo upgrade kit that support bigger HP, check our other ebay listings
!Closer Look!
http://www.cxracing.com/mm5/merchant...T-7MGTE-STOCK3
This page is there official site and they charge more, but they show more specs..