I made this for a very specific application. Seeing as how simple it was, I whipped it up in Tinkercad in just a few minutes. I used the clips from the original file I remixed and the general idea behind the project, but because I didn't want the brush tips (which had an hourglass handle and a brush tip on both sides) to touch the bottom, the clips were needed and were resized. I purposefully left the model ungrouped in Tinkercad, because you can't go back and make changes once you group them and exit. If you'd like I can post a like to a copy of the project and you can adjust how you like.
If you're in the US the specific set of brushes I used can be found at the following link- FYI I am not associated with the link, the company that runs it or the brushes themselves. I just made the model to fit them for my better half. She seems happy with the model I made.
https://www.amazon.com/dp/B0B6PCVT9D
I printed in PETG with 4 perimeters, and the base makes it nice and stable. Supports are needed, I used the new organic supports in Prusaslicer Alpha3, I think. Supports on build plate only. If you're savvy, use paint on supports to reduce the number of needed trees. Current version is A5.
The author remixed this model.