I spent way too much time completely modelling out one of these hand-fans, so I could build this mount around it.
There's a bigger and smaller version; the bigger version holds it more securely, but takes longer to print and is more visible. The smaller holds the fan a bit less tightly, but is quicker to print, and less noticeable.
For me, the large one takes 59 minutes to print, whereas the smaller one takes 47 minutes.
Both have a variation with clearance for screws up to 5.5 mm. The “standard” variation of both has a clearance for screws up to 4.5mm.
All pictures show the bigger version.
The author marked this model as their own original creation.