I've located a Mustang breaker about 40 miles from me in Henderson NC. All the guy does is buy Mustangs and part them, cheap. He's put aside an engine, transmission, rear end, suspension, brakes, and some other parts. Cost? Looking like $450. The tranny was just rebuilt and the engine still runs, no smoke. Turns out nobody much wants the 3.8L engines and 7.5" rear ends so you can get them on the cheap.