I found a couple of Used K03 Turbo's on Ebay - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• I found a couple of Used K03 Turbo's on Ebay by GEE-BEE on 07 Oct, 2009 17:32
• One in bad condition 60.00 ( U.S. ) sale
  Rusted oil line's, bad impeller wheel...
  
  The other in great condition , no play , perfect impeller 98.50 ( ebay U.K.)
  
  Iam going to pull the good one apart and ceramic coat the housings before going to GPOPSHOP for a complete OHC, the other maybe they will buy a core
  
  
  Iam using silicone hose on the controller/Actuator
  
  If any body needs a oil line feed or return, let me know...
  
  Gee-Bee