Why not just get a new key made??
I ride alot far into the desert alone for camping and such. it will totally suck to have this bike not start cause the key and the ignition switch were/are worn. Today I nearly had to have it hauled back to my house from the bank because the key would not turn to the on position no matter if I pushed down, let it up or ,removed and put it back in. After messing with it for some 25 minutes it finally went to on and I rode it straight home.
I am a function over looks person. I can afford to figure the wiring out a lot cheaper than I can buy a new switch and key.
I did this in the old days to a 900 Kaw and it worked great till the bike was ready for the junkyard.