I wanted a under shelf mount for my Cordless Screwdriver
(harbor freight 64313 https://www.harborfreight.com/4v-lithium-ion-14-in-cordless-screwdriver-kit-64313.html )
So I took a profile pic of the screwdriver on graph paper, traced it into rhino3d, extruded it and cut out mounting holes for #8 screws.
It fits very nice. a little bit of play to make it easy to get in and out, but is held very well.
Now i need to do this for my other drills, because this beats the circle mount by a mile.
The author hasn't provided the model origin yet.