A half-dozen of the 18 by 24 size is all that I would really need at the most. If I were to end up with a donor S-10, I'd try to get a couple of those 4 feet by 8 feet ones on the for sale thread up near Columbia.
I've actually spotted an older Datsun-looking car in my home town, very similar in appearance to the
Blue Meanie, only red instead of blue. It's had the grass growing up around it for a month or so...