schwinn cotter bolts source?

Nice to find such a great forum! I am still riding my ancient Schwinn Cottered Crank Unicycle but need to replace the cotter bolts again. Does anyone have any leads that I might pursue to find these replacements? It wasn’t easy finding a new crank and cotter bolts 30 years ago when I fixed it last! It may be time for a new ride, but I’ll never part with this trusty relic.

I have an ancient schwinn and recently needed new cotter pins. I bought these from unicycle.com and they seemed to do the trick.

Thank you so very much! I’ve ordered 4 so I’ll have extras if I need to grind them at all. I really appreciate your assistance.