I don't know if PartsShop has turbos, but you might want to give Performance Products (formerly IMPCO) a call. 1-800-243-1220. I am pretty sure they would have a rebuilt turbo for your car. They're usually around $800-$900.

------------------
Rgds,
Aaron Greenberg
MB technician
'67 250SE Cabriolet
'77 450SL
'79 6.9
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8