jim carter has 3/4 ton bed parts available in their catalog, but i don't know what the quality of the panels are. someone else might be able to give you some insight on that issue but most of the comments i've heard on this site refer to the new reproduction stuff being a little on the thin side as opposed to the original panels.
honestly, if it were me, i would look for a bone yard and salvage the bed off of a 3/4 ton truck. down side of this approach is that some of the old stuff will have seen better days (which is why you may have to salvage it from several trucks).
one other thing...some guys (and gals) might be looking for "wrecker contraption" parts, so if you don't want them you may want to post up a picture and a price in the for sale section.
