I have a 1978 Glasply 21 foot runabout boat. The lower windshield gasket on it has shrunk and cracked due to the age of the boat and I need to replace it. But I have had absolutely no luck finding anyone that sells any type of windshield gaskets for a boat! Does anyone have any recommendations? I'm sure there are companies out there that make the windows for all these boats....but where are they hiding?<br />Thanks