Broken alternator bolt

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Any suggestions on what to do. There is a rebuild shop here in town but, they don't come in until Monday.
The corner garage got I guess some of the broken bolt out....

I thought about going to Lowes or something and just getting an open ended screw that the bolt will go back on....but id like to do it right I guess lol

 

You mean another bolt somewhere on the truck? I haven't a clue. The wires running to the alternator are just long enough to reach the alternator, they probably won't reach elsewhere...

 

This one is brand new, its just been a spare. I installed it Last week and realized that I installed it upside down, which means I had to stretch the positive wire, anyways I tried to reinstall this morning.

This is a 210 amp alternator, I wish it was only $250.....

 

Could I possible, take the nut off here, go buy a bolt that's longer the the screw and just screw it into the on the alternator and just screw the nut back on there?