1 pointIf you want it to be wood try this. Get a bit of 6 x 3/4 inch pine, draw the inside of the top of the door onto it, if you have a bandsaw, if not a copping saw will do, cut the shape. Get some veneer, cut it into the width you want, wet it so it is not brittle, wipe off any excess water. Get some PVA glue apply it, not to much as you don't want it squezzing out all over the place. Use a candle to wax to both parts of the shaped pine so it does not attach to it and clamp it all together. Leave it till the next day and it should come out the shape you want.