I finally got some “new” seats. These came out of a salvaged 1994 Chevy truck, but they were originally from a 1990 model. Either year would have fit. It took me about 6 months of watching and waiting to find some decent condition, blue seats for the truck.
Before installing the seats, I thoroughly cleaned them with Shout Auto Dirt and Stain Remover (you can get it on Amazon here). They came out very clean and smelling fresh.
Here are the old seats for comparison:
I would say it was a worthwhile upgrade :).