Here is the STL and the Fusion file incase you need to make any modifications to it.
I printed in PLA at 20% infill.
The screw holes on the side of the switch are M3. I used 8 total M3x8 screws and 4 #6 wood screws to mount to the bench. You can use/modify for your fasteners but the eight M3x8 screws are mandatory.
The author hasn't provided the model origin yet.