Right up my alley guys, I've got the same problem with my '50, 3604. They took the under bed spare hardware off and jerry rigged a mount on the box behind the drivers door. I would like to fab the new hardware if I could get some pictures of the original factory mounts, seems they were all thrown on the scrap heap or cut up for the side mount. I would also like to see some pictures of the inside/outside of the factory RPO side mount, seems like almost all of them were homemade, been looking for a couple of months butt still haven't seen the factory version.
Denny Graham
Sandwich, IL
