from a poster here (Fantasy Performance).....
"The exhaust housing's I am offering have a T03 foot print and are cast by Precision Turbo's in the US. They use a Ford style T03 internal wastegate set up but are a proper GT housings"
i believe the housing was coming from a Qld Turbo supplier.
perhaps there is an option internally gated with the 60mm turbine.
ps. don't panic if you don't understand the above info. i have been getting my head around this info over a period of time, with a lot of patient help from disco. there are lots of threads that relate to the 'real' GT3071R' if you do a search you will find them pretty easily.