I used safety tinted glass and love it. Seawater turns lexan and other plastic products cloudy. I called my local car auto business and asked for a list of people who do glasswork on the side. I took him a template. $75. As well you can contact Bill Smith to use the same fellow who cut the windows for Awesome. At the recommendation of my yard, Sintes Boat Works, I used black Silaflex on the inside and white on the outside. The black helped make a consistant blend with the dark tint while the white matched the external paint. The job cost about $100 total including glass and caulk. After several years - no leaks!
Reference:
http://www.silaflex.com/
Here is a photo of the back window. I'll try to find a better shot.
