I went to install new window felts on the rear roll up windows on my '70 which mount to the body. The curvature does not fit as the radius on the window felt is to great. Bending it appears not work without a fixture. Even the old one is not fitting correctly. Are there any recomendations on how to make it fit, or if there is a brand name which is preferred? Any suggestions from the more experience installer's of this item?

Thanks