Don't know where to post this, but I need a half nut cam for a 13" Sheldon. My split through the hole the handle ping goes through. I could weld it, but I'd prefer to replace it if someone has one. I've seen folks here post that they have parts for Sheldon's from time to time. I am a member of the yahoo Sheldon group, but no on there has responded to my need yet. Thanks!