Lexan bends really nicely in sheet metal working tools, such as the box and pan brake. If your school has a metal shop... give it a try on a practice piece.
If you are wanting compound curves, however, you might want to try vacuum forming. There is a very extensive write up here
http://support.knowlton.ohio-state.e...acuumGuide.pdf But it is actually fairly easy to build your own small vacuum former.
Just google vacuum forming diy for some ideas.
Jason