I wanted a receptacle for my Olight i3T EOS style flashlights, so I made one. Screws onto a wall/shelf/whatever with 2 screws (<Ø3mm).
Should also hold other flashlights <Ø15mm.
Printed with 3 walls and 20% infill. I'd use supports for the holes, but they might also work without.
The author hasn't provided the model origin yet.