Well I live in japan so I come across these turbo all the time and I have a few sitting around pm me if you need one.

 

JGY is a shop on the east coast that does lots of FWD and RWD SR20DET work. They have lots of used parts and might be worth checking out. Here are some parts they have listed currently. Might be worth a call...
FWD SR20 Used Parts

RWD SR20 Used Parts

 

^ I can vouch for these guys... They are hard to get ahold of sometimes, but back when I had my S14 I got A LOT of my SR swap parts from them including the motorset. Just make sure you go into the phone conversation with a good sense of humor...