I have a set of Drag Specialty mirrors, flamed backs/skulls stems. Like a retard, I broke one off, in a futile and poorly timed attempt to tighten it up. (After of a long day of riding, as the sun was going down...didn't want to waste daylight riding time the next day...) I snapped the top end of the bolt off, inside the stem. Removing the broken place isn't my problem. Got that handled. I've tried to find a replacement bolt, to remount the mirrors, but the problem is one end is fine thread (the end that goes in the mirror stem) and the other end is a coarse thread. (End that the signal light mounts on to...) Any ideas on where I can source a replacement? Any and all suggestions appreciated.

 

I like ACE hardware, They have many assortments and also chrome hardware. For internal eng bolts I go to NAPA

 

I'd look up a fastener company in your local yellow pages or online.
We have a huge company here called copperstate nut and bolt and they could probably fabricate it if they didn't have it.
I know the hippy buddy of mine that lives on a ranch in the middle of nowhere would just grab some stock and dies and fabricate something to work.