I bought the turbo thats on the truck now at the scrap yard. It was like $5. I have a couple that I bought down there. They closed the place down though
The one I am going to run I bought off of craigslist for $100. It is perfect. You should be able to find one for $150-200.
I also had to buy a wastegate. It was a cheapie off of ebay for $65. The carb hat was $75.