Well - if you can handle 4x8 sheets, you can pick up the stuff in home improvement stores. It's about 1/8" thick with a pebble finish and comes in various shades of white. It's very very tough stuff. You'll tend to find it covering the walls of public bathrooms and walk-in fridges. I used it to repair the closet in my Boler
(sheathing the old closet in the stuff). It's easy to work with, and I thought at the time it would make a great material for the outer covering of a homebuilt trailer. I was thinking more along the lines of teardrops myself - but it might work for ya.