It's a nice looking truck. I think that if you want the "look" of a wood bed, do as HotRod John states with two pieces of 4x8 plywood and splice in the middle with an original style metal Strip
Take it one step further and groove the plywood and install a set of metal strips right on the plywood. You could even get some nice veneered plywood and finish it off pretty nice. If you did the splice right, you could pop the floor in and out pretty easy.
