Originally Posted by FBinNY

There's no need to replace the dropout. If the OP clamps the dropout in a large vise, with the hanger sticking out, the vise jaws will act as a heat sink, and he can ad a bit of brass, to push the stop position back. While he's there he can braze or solder in a thread insert so he doesn't need the nut in back.

Otherwise he can do the cold solution I suggested in my first port.