sierrax
+1y
If you want the factory look use vinyl. Use a heat gun and try wrapping it around some test pieces before doing the actual panels. Also mess around with the amount of glue that you will need.
You can use any material that you want. the factory panels are very easy to do as they don't have any real curves or bends, just the outter edge. Anything that you get, mess around with it first.