My brother in law made a great score FROM THE DUMPSTER on a big piece of isinglass.  He works at a place that shares a building with a canvas place, every once in a while there is some good stuff in the dumpster.  This time it is a piece about 8' by 14', oh yeah, it must have been a porch curtain, (lots of fancy cottages on the lake here) it is slightly weathered but I would say great condition. 

Now I get to start brainstorming an enclosure or bimini or something.  I have a bunch of free tubing too.

Thinking like a sailor :)

Dean