2-sided 2020 Extrusion, parametric

I found a part that was designed to mount on a 2020 extrusion but I did not have one the right length and the application did not need much strength. So I figured I'd print my own, and then decided to save some time and money by only printing the two faces I actually needed. NOTE: the file "2020 Extrusion.stl" is from https://www.printables.com/model/312162-2020-2020-r-2040-3030-3060-aluminum-extrusions/ and is used by the OpenSCAD code. It is a full 2020 extrusion, and not my work. You can either set the length in OpenSCAD or just resize the provided STL in the slicer.