Attached here is an outer rocker panel template that I made up for anyone looking to make a patch panel. Print it at 100% with no page scaling on 8.5" x 11" paper. After it's printed you can cut it out along the inside edge and check the fit on yours and trim as necessary. I tested it yesterday on mine and the cutout fit very well but then again that panel was the basis for the template. The template was made from a piece of wire bent to the profile and then it was scanned and worked over in Fusion360 a bit. The sharpness of the bends will depend on the person/metal brake doing the bending.