My wife uses a paper holder similar to this at work and she couldn't find any, so after a little trial and error I was able to make something for her that would work. If you are needing to hold a piece of paper up while typing, this may very well work for you.
As always, if you have any questions, concerns, or comments please let me know in the comments!
Edit 3/3/2019: I added the original 123D design file as well as the new Fusion 360 file. I haven't tested the new design, so let me know if there are problems.
Printer Brand: Prusa
Printer: i3 MK2S
Rafts: No
Supports: No
Resolution: 0.35mm
Infill: 20%
Notes:
Printed with PETG
The author marked this model as their own original creation. Imported from Thingiverse.