I printed these in PLA at 100% infill. I hope that people who are looking for these ,and have a 3D printer will be pleased with them.
The author remixed this model.
I liked the original model, but I wanted it to be enclosed on the bottom. So I reworked the model to have a bottom. I also adjusted the size for a snug fit. I only have cooler master sickle flow fans to mock this up with. It might fit other fans also, but I cannot guarantee it to fit.