If you decide you want a used control arm, Look on American Craigslist (in high population areas like Portland, New york, Seattle Etc etc) and look for cheap 74 or 75 newport's/new yorker's that are being parted out, and see if they'll sell you what you need. Control arms usually dont go bad even when the rest of the car is a rusted out pile of crap. its usually the body and interior that get the worst of it