Just so you know Fox barrels are hardly interchangeable. neither are Parker, LC Smith, etc. They were made before modern match matchining and were handfitted. If youfind a spare barrel you are 99.9 % certian to have to get the gun rejointed. if your barrel isn't bulged too bad you might get a qualified man to remove the bulge with a mandrel to hold bore size. That may be easier than going the spare barrel route.