Mower Yoke Pin

[dhopwood]

I'm looking to locate a 1/2" diameter spring-loaded Yoke pin for a 5' old mower I pull behind my tractor to finish pastures. I bought the old mower used, can't tell what brand it is, but it has a decal on each side with a globe of the world underneath a grid pattern, if that helps identify the brand. The missing pin would be tapered on one end...that is, in the yoke assembly, one hole for the pin is larger than the hole on the opposite side. Let me know if you know where I could find such a part. Thanks.