I called a local plastics company,Industrial Custom Products in Minneapolis, and they said that a 4' x 8' sheet of .060" black Kydex would be about $70. That's less than $2.50 a sq/ft. If you have ever had any interest in playing around with this material, that's a pretty unbeatable price. Ive used it for one project, and anticipate using it for many, many more. It's stupid easy to work with, and has almost endless uses.
Just throwin' it out there....