Considering I've seen people buy RUNNING turbo cars for cheaper then a motor, and have seen people part out engines and make a lot of money off them, I can't see why you can't afford the engine but can all the components. 
  
Just search around, if you can be patient you'll find something. 
  
And if you're thinking about modifying (what I gathered from the t3/t04e), I recommend not to bother with the stock ecu, fuel pump, and injectors. 
  
Search on this as it's been HEAVILY discussed... 
Mario