They are very cute! I got some seat covers for the back seat of my 80 from Specter Off Road that I like a lot. They are almost like canvas, but not quite that stiff. Gray to match the interior and they look like new after many years of use - granted, my back seat doesn't see that much traffic. I will be there on Saturday at TAV of you want to check them out.
I don't know if they would have them for a Tacoma, or come to think of it, is Specter still in business? I know Marv (the owner) passed away in the last couple of years.
Also, not sure how well they would hold up to little "poop factories", but probably better than most seat covers.