66 dart convertible

I too have a red 66 Valiant slant six convertible. The body is almost completely rust free and needs little work (I bought it when I lived in California) but the interiror is a mess. Did you have trouble finding seats, carpets, etc.? I've checked with Year One, Legendary, and so forth and most have stuff for a 67 and newer Valiant. I was wondering if 66 Dart seat covers would work. Mine are toast and so is the carpet.