Is there no radiator repair shop anywhere within 100 miles of you?
Try to find one. Driving to it will be worth your while.
Unless the tubes are completely corroded inside, radiator repairs are not difficult and are relatively inexpensive. My local radiator shop will boil out any radiator and solder any leaks for $90.
Repairing your original copper/brass radiator will normally be a lot cheaper than buying a new one of typical inferior quality.
