I'm just guessing that for a replacement skin you'll just use sheet metal of the same guage. cut the old stuff out, put the new pieces in place, weld and grind.

I think in thread in the last couple of days there was a link to pictures of the door panel skins being replaced. Might have been the stretch one???

'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi