If you don't need a huge sheet go to a scrap yard. We ( company i work 4) throw away (scrap) sheets that would b big enough 2 do anything you want. We get paid 17 cents a pound 4 it. Not sure how much they would sell it 4.

The people who say I can't do it can just sit the @^#% down and watch me. Friends call me Rusto I also subscribe to pond boss mag. http://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=504716#Post504716