1963 Valiant 2-door post interior

SMS Auto Fabrics carries the interior materials for many, many cars. I have a '65 Valiant 100 and they have the material for it. It's expensive, but they are the only ones that I know of who carries anything like that. They have reproduction and NOS material. They are based in Oregon. Also, be prepared to wait. I think the last time I ordered vinyl from them, it took 4 months before it showed up. They may have gotten better though. That was like 8-9 years ago. Good luck with your search!