So I am rebagging my truck because the job before hand was pretty shotty, so you can see it will be easier for you to do. Also I will be flush building these notches, making them appear to be stock. You can skip this, making them easier to do while still keeping a nice styled notch.

I first took some scrap cardboard, rough cut a shape that covers the notch, and then went to town trimming with scissors and a utility knife 'til I got the shape I wanted. The holes are going to be Holesawed and sleeved later.

The pattern is then transfered to some 3/16" plate to be cut. When it is all cut, ground, and finished, you have your four identical notch plates!









