Need a front subframe for a 1970 Mustang

[CamaroPat]

A buddy of mine and I are hoping to restore and probably sell a 1970 Mustang fastback. When we began stripping the car down and removed the engine, we realized that the crusty old 351W was all that was keeping the front frame rails in place. I can't believe the car made it home on a dolly! I've been looking for a subframe but when searching for a Mustang subframe, all I get is Mustang II components. Cost is a factor. I'm not looking for anything outstanding. Does anybody know of a company that makes a low cost replacement, or a salvage yard that might have one in stock?