Hot Rods 32 Roadster Windsheild Seal

I am replacing the windshield on my 32 Roadster. Original style 2" chop. The lower seal I have that goes between the frame and the body is larger than the ones that were provided for the sides. I believe these came from Speedway, had them a while. The slot in the frame is the same for all three sides. There is absolutely no way the larger seal will go into the slot in the bottom of the windshield. Is the seal suppost to be the same on all three sides? Who makes or sells the best seal for this application?