Adafruit has the Swirly Aluminum Mounting Grid for 0.1" Spaced PCBs and included a link to a KiCad python script to generate the same. But I don't have or know how to use KiCad but I do know how to use Fusion 360.

Using the description I created the sketch for one of the squares and used pattern to extend it to a 5x10 grid.

EDIT: Added grid sizes 2x10, 5x5, 5x10 and 10x10.

All credit goes to Adafruit.