Post 18 in the thread link shows some of the structure of the cab 11/12 doors found on Bob Carriere's trucks
http://www.mapleleafup.org/forums/sh...ighlight=frame
Pretty much all parts can be made with only a bending brake. The perimeter frame is basically a shallow U section, the curved section of the perimeter can be formed from a straight section with heat. Likewise the bracing bars are flat with folded edges. The tab to fold the outer skin around is easier to spot weld to the perimeter than to make as part of the perimeter frame. There are no compound curves to the skins (unlike the inner panel of the cab 13 door). The dovetail for the side opposite the hinges is available from Macs and possibly others.
http://macsautoparts.com/early-v8-fe...0R3CHL1073245/
Likewise hardware for the door check straps (also available from standard truck supply palces as "footman loops")
http://macsautoparts.com/early-v8-do...0R3CHL1129784/
We haven't found a good source for matching hinges yet.
It will make life a lot easier if you can rebuild a pair of wrecks because you can use one as a mirror image model for the other, also permits you to reuse hinges etc if they aren't too worn.