Some of the old Oliver dealers may have a part number written down somewhere. If I can find one of the links in an original package with the part number I'll let you know. Don't hold your breath though. It's been 30 years since we were selling Oliver but i'll snoop around all of my &quot;spare parts repositorys&quot; (read that, a pile here and a pile over there) and see if I can come up with anything. If you can get the cotter pins or that J pin bent over properly the things will last a long time, which is a big &quot;if&quot;.