Source for "Kickout Ring" aka "Circular Cotter" ring/pin?

[WranglerX]

I've got a box. Used a couple already, seem fine. I'd like them better if the pin had a flat on one side.

TSC has pins with flats on one side...

 

[DaBear3428]

Not that I'd recommend it...

Lynch Pin Kit, 50 Piece

Amazing deals on this 50Pc Assorted Lynch Pins at Harbor Freight. Quality tools & low prices.

www.harborfreight.com

I have a box in my tool kit, cheap and handy when i lose one (like every 30 seconds)

 

[alexpops]

https://www.tractorsupply.com/tsc/search/lynch%20pin?

 

[CADplans]

I have those rings on the 3PT hitch of my JD650 (NOT lynch pins)

I too was worried about loosing/destroying one,,
Then, I found a spring that looks like a giant screen door tension spring.

It is the right diameter (close enough) and correct wire size.
All I would have to do is cut 1.5 turns off of the spring with an angle grinder, and I would have a new ring

Best of all,, the cost is ZERO!! WOOT!!