i have seen a few good tubo kit ons ebay for like 500$ to 750 with turbo and the piping just add for out the back of the car. BUT if your good with a welder and piping make a kit. turbo can be found on number of cars and trucks.
A buddy of mine (Rick) owns a shop (TNC HotRods) that is currently working on my turbo setup.
He is more than fairly priced, and the work is top quality. He's is a Percision Turbo dealer and does sells parts, not just kits so if you want to piece one together yourself. Check out the link below or in my sig.