Shrank the original models mouse holding area and corresponding lid in blender so the parts both fit on the Prusa Mini+ build plate (180x180) with a little room to spare in case your printer requires a brim to avoid curling on such large flat parts.
You'll need something stronger than PLA if you are expecting this to work for more than a few days, all the other parts can be grabbed from the original post.
The author remixed this model.