After giving it more thought. I ended up ordering one of these. I think it will be much stronger and more durable than the Floodsaver and better than the cheap crap ones at the big box stores. I did think about a metal one and 30 x 30 galvanized pans are readily available as rabbit cage bottoms at a good price but I decided the fiberglass was more sightly and wouldn't rust.

Toteline® Fiberglass Dryer Pans and Trays 30 x 30 x 1 1/4 | U.S. Plastic Corp.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13