Am replacing the fixed windows (rear and side 1/4s) in my '30 Fordor. I'm sure there is a seal required but am unable to find anything specifically. Lots of "seals" for windshields and door windows but have searched and cannot find anything applicable. Do these windows have manufactured seals or do you just use some type of caulking/sealant? The windows (which were already removed from car) appear to have had some sort of hard rubber gasket. Anyone have info on this?