i made panels for my 54 out of 1/8 inch oak plywood mounted on a "home made" wood frame that is appoximately 1/4 inch thick. glued the plywood to the frame and used the original mounting holes but with longer screws. just enough room for the door and window handles to fit after a little creative sanding. i tried to do the same for the headliner but gave up on it - curves are two sharp in the corners etc.
