Try Advance Auto or Auto Zone. I was able to get a generic one for my Honda Nighthawk there.
" Loud Pipes Risk Rights "
2001 Vulcan 750
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
Pic up coil mod done
All LED lighting
Upgraded Mosfet rectifier
I finally realized that one of the smaller post on the solenoid is a ground lug. The other smaller one is the low voltage that goes to the trigger. Then as soon as I realized that my brain got in the way and removed it I figured out this was an oversized relay. Went out to my dead riding lawn mower and pulled its solenoid. Now I got a working solenoid until I get this bike running.