DOES ANYONE KNOW WHERE I MIGHT FIND THE STAINLESS WEATHERSTRIP CHANNELS THAT MOUNT ON THE MAIN BOW AT THE REAR OF THE DRIVER AND PASSENGER WINDOWS? I UNDERSTAND THIS WAS USED ON 40 LASALLE, 41-42 CADILLAC. AND 41-42 BUICK SUPER CONVERTIBLE COUPES. 14.5 " LONG WITH A CURVE IN THE TOP 1/3. THANKS billhoniotes@sbcgobal.net (630)464-9333.