This is a prepackaged version of these two systems:
https://www.printables.com/model/283286-universal-peg-board-peg-system/files
https://www.printables.com/model/658323-gridfinity-mount-for-us-peg-board-up-to-3x6-no-sup
I recommend printing with 4 walls at 0.2mm wall height.