I found just the thing at Great Lakes Fabrics, Inc. Clear vinyl window material. They were very helpful and the price seems quite reasonable.
"Hello,
We do carry several thicknesses of the clear. I'd think you'd probably go with the 20 gauge. A half of a yard would measure 18" by 54".
It comes 54" wide, so that's the width it would be, by the 18".
The 12 gauge is a little thin, but it's more flexible. The 20 gauge should be able to flex enough for your project, too, but it will just be a little stiffer.
A half of a yard of the 20 gauge would run you $5.15 plus freight to you."
Great Lakes Fabrics, Inc.
http://www.glfi.com/ [This message has been edited by deatonent (edited 02-05-2004).]