I know this isn’t exactly what you were asking for, but I hope you will find this helpful.
This is an idea I came up with last year when I got tired of looking for reliable clip-on fans. I’m much happier with the solution I came up with, as it is more versatile and I never have to worry about the clip failing and the fan falling.
I bought these Holmes Blizzard 8" oscillating fans
I drilled a series of 3/16" holes about 2" apart all the way around the base. I use paracord in 2 of the holes to suspend the fan upside down.
By changing which holes I use, I can alter the angle of the fan.
I can easily change the height of the fans via the paracord. I can also adjust the paracord at the top by just sliding it if I want the “swing” of the fan oscillation to go a little more to the right or left.
I am quite happy with this setup now. It keeps the fans out of my way, I can easily change their location/direction, and I never have to worry about them falling.