Pete, The hardware alone for these old stake sides is very hard to find, most lost the original sections one by one till gone. I have a 53 stakebed that some how survived with all the sections minus the top row of boards. You can find factory drawings in the old manuals online, I'll try to attach a link.
http://chevy.oldcarmanualproject.com/ This should give you a good idea of how it all went together. I like to check ebay for trucks for sale, usually have lots of good photos. What I've seen done that looks really nice is having a local truck accessory shop provide all or some of the hardward to use. It's not 100% original but looks good and gets the job done. Best of luck with your project.
Jim
P.S. Here's one on ebay #271153268669 home built.
