Were you thinking of something like this?
I was going to do this on my 1917 REO street rod when I get back to that project.
I am sure a lot of the metal parts can be made or picked up at a Farm Supply Hardware store.
Use a quality Marine Varnish on the wood from a marine supplier.





http://www.snydersantiqueauto.com/mo...ts/pickuptruck

http://www.snydersantiqueauto.com/up...tions-5879.pdf

http://www.mtfca.com/discus/messages...tml?1202700406

Hope this helps.