Finally got a reply from Jim Carter, Inc. and they said they do not have a pattern they can send me. They also do not sell a one piece headliner.....only two piece.

I found what I think will be a great piece of material for my headliner.......an old 4 X 6 plastic POLITICAL SIGN!! They plaster the things all over during local elections and then throw them away afterwards. I confiscated one after our last election. I've used this same material as the basis for my door panels with good success. I covered them in sheet vinyl glued on with 3M adhesive. It's sturdy material and the price was right.

Thanks,
Spot

Chuck
1950 Chevy 1/2 ton (all original)
1951 Chevy 1/2 ton (future streetrod)
1941 Chevy coupe
1938 Chevy coupe streetrod