Try digging through the junk yards in your area,you might get lucky.If you ask for the banks system they probly wouln't know what your looking for.You will have to look on your own.
Or start watching ebay.$$$$
I pieced one together over a year,but i wanted a different turbo,and i'm cheap.
Good luck
Thomas
90 Chev 3500 c/c 4x4,6.2na,400 auto,4:10 gears.DSG Timing gears,main girdle, isspro tach, pyro,boost,oil and trany temp.Dual Tstats, High volume peninsular pump,on shelf, Custom turbo and intercooler 85%complete. Change of plans for the dually, it's going to get a Cummins. Both trucks are Blue 90 4x4 crews