I'm looking for another tank for my bike, but I'm not having a lot of luck finding one for a 1980 650. Does anyone know if other year/model tanks will fit my bike? A 750 tank, perhaps? I know an 81 650 will fit, but I can't seem to find one of those, either... My tank is leaking at the base of the fuel port, so until I find a replacement, my bike is a yard ornament. Sucks...