Exploded view of cab parts available anywhere?

[drptop70ss]

Next project will be soon, a 1950 GMC 150 pickup. Problem is there is heavy rust in the floors, kick panel areas, mount areas, etc..is there a diagram anywhere that shows how the various parts that I am missing go together so I can know just what is missing? Or a cab repair thread with good pictures? Probably simple but with the amount of rust it is hard to tell just what the original parts looked like!