From your description, it sounds like you have an OEM Mopar windscreen. See how it compares to this:

http://www.ebay.com/itm/2005-2008-Chrysler-Crossfire-Convertible-Windscreen-MOPAR-GENUINE-OEM-BRAND-NEW-/321630008209?pt=Motors_Car_Truck_Parts_Accessories&hash=item4ae2a47391&vxp=mtr