Ever heard of Optic Armor Performance Windows?
They are in Linn Creek MO....saw their ad in the last Grassroots Motorsports Magazine.
They say the Polycarbonate windshields are 50% lighter than glass but 250 times stronger.
They also make custom windshields!!!
I am contacting them to see if they will make them for the GTP and what the cost would be if they can.