Dummy Noctua-Looking Computer Fan

I needed a passive air return near a Noctua 120mm fan, so I made a dummy fan that looks like the Noctua.  It has no blades, it's just a hub and a surround, styled to look like the iconic Austrian brand.

This not-a-fan is nominally 120mm wide by 19mm thick.  Noctua's 120mm fans are 15 and 25mm.  The soft rubber seal in the photos is from an actual Noctua fan.

This dummy fan is part of the FilaBilly Humidor project.

I modeled this in Fusion 360.  I've included the CAD files in .f3z (Fusion archive) and .STEP formats.  The CAD models have other components as well, but the dummy fan isn't hard to find in there.