I found a source in Atlanta that will ship free if over 100 pounds. http://www.saf.com . I know that 3003 aluminum is not rated quite as high as 5005. Any ideas on the difference. I can get the .040 3003 in 10 ft lengths 60 inches wide so that appeals to me.
I may be able to locate aluminum locally with more effort, but so far, have not.
With four sheets of the 3003, that would completely cover my proposed 5 x 10 tear with a bit left over for ice chest, or other project.