I have a 1991 Prowler Bass Boat, 16'8" long, made by Sunbird for 3 or 4 years and I can't find anything anywhere on the internet. It is a sharp looking boat, and I would like to add a windshield to the driver's cockpit. How do I measure for the correct shield? I've seen several windshields advertised on ebay, but many have different width dimensions and I want to make sure I get the right one the first time. Thanks,<br />blt