I got a PM asking for a trace of the NC C-Pillar trim so I went to the shed. While there I dug out an old one. I ironed it flat.
The old one is of unknown origin. It is a light grey lizzard skin vinyl that has been sprayed black while in the car leaving an outline of the bits hidden behind window rubbers, hood lining and parcel shelf. I wouldn't mind betting it is original for the 64 850.
So I overlayed the two and it appears that the NC version has the correct side profiles but they may be mis-aligned. I can't really tell.
The old one has additional material where it is folded through the window openings before the seal is applied. The new one must just tuck into the inside of the seal edge.
Here are some comparison pics:
Back edge lined up
Front edge lined up
These things are way bigger than an A3 sheet of paper so I can't just trace, scan and email. I think it's better to trace onto butcher's paper and snail mail.
M