I have an exterior door with 2 sidelights on either side which is actually one piece. The house is wood siding and no porch cover, just a stoop, but very traditional. I am looking to purchase a broken pediment for above the door with the attached sidelights. The total width of this is 63". I also need to cover some metal flashing that is between top of door trim and the trim to be replaced. Where do I begin?