[1970CDV]

In my 1970 Coupe de Ville ive decided to toss the stock door panels and fabricate some custom ones. As far as the majority of the panel i know exactly what to do... but im still going to have one problem. i only know how to make flat panels. once mounted this will leave me with about a 2 inch gap between the top of the panel and the bottom of the window. im sure there has got to be something i can use like a thin piece of sheet metal i can bend...then seal the whole thing together. but if anyone has a better suggestion please let me know. i dont want this to turn into another nightmare.