Where to source turbine housing for stock frame BW EFR 7163 turbo?

I've been looking for a turbo setup for a stock block and really like the look of the DrivenFab stock frame Borg Warner EFR 7163. Not only because of its spool and top end characteristics, but also because it can be run with an open dump which should reduce WOT manifold pressure and improve top end power. I've tried contacting DrivenFab, but from what I can tell it looks like they may not be in business. Wondering if anyone knows where DrivenFab was sourcing their stock frame turbine housings they were pairing to the EFR 7163?