I bought an DEGBIT bike light (the bundle with 60lux front light) and the mounting clamp is too small for my ~31.8mm handlebar.
So I designed a bigger one for ~32mm diameters (this way I can use one of the rubber inlays).
The lamp slide-clip and the closing mechanism can be removed from the original clamp and attached to the printed clamp.

The only other thing that is needed is a M3 screw for the hinge.