Sierra Custom Package?

[71super402]

Hi all, I have a 70 GMC 1/2 ton long bed with a Sierra Custom package and I cannot find anything on this particular package. I see Super Custom, Custom and Sierra packages but haven't been able to find the Sierra Custom info. It's an all white truck with black bottom exterior molding (no molding above) with green glove box, green dash pad and green instrument cluster, green visors,green scrolled vinyl with wood door panels and green scrolled vinyl with cloth bench seat, but the metal parts of the interior (beyond the glove box door) are all the exterior white color. It did not come with a headliner.

I am trying to get more info on this package as I need to replace the seat cover and I'd like to find a replacement that is NOS, or a copy of the original. The cloth part of the seat does not look like the hounds tooth on the Chevy Cheyenne package.

Thanks for the help!