I have a '51 or '52 3/4 ton truck with a solid bed on it (no fenders).. shame you don't live closer!
I've seen alot of repro fenders made from metal and fiberglass, and compared to the originals, they sucked.. I don't have any direct experience with the repro beds.. if they're built like the repro fenders i've seen, I can't imagine they'd be good for any real hauling or work.. but if you're just going to use the truck for shows or sunny weekend drives, then I guess it dosen't matter.
Jed,
My beat to crap original '46 tailgate was just as heavy, if not more so than the AD tailgate.. but that might have been because there was a long iron bar running thru the bottom of it!