Thanks for the suggestion of Laysons. I ordered seals from Laysons. The seals seem to be made in the correct cross section profile. Each one is enough for one side. The tricky part is that the seals are one straight rubber gasket with corners not built up. It appears to me that it will need to be cut into two parts and mitered to the front upper and rear lower corners. The upper front corner is right at a 90 degree angle. The rear lower corner is an acute angle of about 67 degrees. The gasket is unlikely to make those angles by bending. I think I'll chat with an older and experienced glass person for any help. If I can't get advice I think I can do this anyhow. I've been googling ways to joint the rubber with chemicals but that seems an unlikely method. The originals' corners appear to have been joined with heat in a form. I'll probably use black silicone or some other black stuff to seal the miters. This will be interesting. The wagon is at the upholstery shop for seat upholstery and there will be a financial recovery period before attacking these side glass jobs. Any advice is always welcome.
Jerry in Denver