Years ago, there was a Company that reproduced the Ford Script Flat Beds, but I don't think they still exist. I did however find by doing a google search of "Ford Script Flatbed", there is a guy that has drawings from a original bed, that he was planning to re-create. May be worth taking a look at. Flat bed, and/or stake beds used no rear fenders. Got any pictures of your truck ? When you say "Open Express Bed", are you talking about the pick up truck style bed that was used on 1 1/2, and 2 ton trucks ? If so, it's not reproduced either.