I wanted to use a small flashlight as a spotlight to accentuate the awesome sound-dampening panel that friends created me for Christmas for when I'm recording videos at my desk, so I designed a parametric solution in OpenSCAD.
After printing, I used a ¼"-20 threaded insert to mount atop one of my tripods. At most angles, my small focusable LED flashlight fits well and a rubber band holds it snugly upside down.
The base of flashlight I'm using measures about 70mm long with a diameter of 27mm. The included STL file (Flashlight Tripod Mount -- 27mm x 70mm.stl) was generated using these values.
If your flashlight isn't that size, install a copy of OpenSCAD and make changes to these two variables to match your flashlight:
The author hasn't provided the model origin yet.