Magnifier Handle
This is available on printables as Magnifier Handle
I read this reddit post and realized I had the same or similar crappy magnifier from a cheap helping hand gadget in a bin somewhere. That inspired me to kill time and make a much more complicated OpenSCAD model to mount my lens in a handle.
When I dug it out of the bin, it was practically falling apart, so I completed the job:
That allowed me to extract just the lens and build this part:
I didn't get the diameter of the lens quite right, so the gap was a little larger than planned, but using a 20mm bolt instead of the planned 16mm bolt to tighten the band worked fine, and that seems good enough:
