I could not find anything only for the M18 version of this, only the M12. I ended up just remaking this based off pictures of the mounts that are available on google. You will have to drill the holes for screws to go through and this mount has not been tested much just yet. It is still a work in progress. I needed this for my work van to keep all my tools organized and off the floor.
The author hasn't provided the model origin yet.