I have one for a 2003 it's 80% done, it's missing rear wheel cut out, driver side boxes need lids, rear bumper & lights , & racks for tanks.
I know a retired welder in Denver that has a bed for sale w/stainless boxes and all. Wants 3 grand for it. It's off a 92 Ford 8 footer.
For that price, you could spend a grand modifying it to your needs. You can't touch a bed like that for the price. Steel is thru the roof now