I have a 16t that was rebuilt (by a proper turbo shop) into an upgrated 18T using a genuine MHI rebuild kit and a billet compressor wheel and housing
I can supply it with your choice of conical, flat or angled housings
$625 shipped, will include the 6 copper o-rings you need for install and the paper oil drain gasket
If interested, PM me and I can send you some photos and measurements etc...