I am building the exact same truck. Classic truck parts sells rubber for pans/burbs but it's the old bead style. I tried to install it my panel but found it difficult even with the bead tool (broke window, and i have installed windshields in these same trucks. try talking to your local glass shop and see if they can either install the glass for with the bead style or if they can just cut and seal new stylr rubber for you. the good thing about doing it this way is that if they break they should replace it. email me for&with pics and coments... [email protected] thanks