Thanks Truckrolet I figured they might be a build it yourself part, Will probably try what I did on a gear box back in the Uk Grind a Cap head screw too the size I need, then secure it with a nut from the outside not perfect but a solution. Plus one of my Dads old tricks from way back cut a piece of Inner tube so it fits Like a washer in the Retainer and it will stop it rattling

1954 3600 With 1950's Powers of St Louis Utility Bed.

My truck