Since I have what appears to be an original upper bench seat, I set out trying to find repop seat vinyl. Everyone seems to want to do the fabric seat, I thought I'd try to find the vinyl that matches mine. Part of the motivation was to do something a bit different but still true to the model year, and part of the motivation was to save a bit of money. Turns out the embossed vinyl is not that much cheaper than fabric.
Here's the swatch from SMS. I'm not going to pull the trigger yet because there are so many other issues with my truck that'd it would be like putting lipstick on a pig.