Recoiller

I was thinking of spraying the robot logo on it although I kind of like it clean as well.

To be exact, I did try a series of bags and can confirm that the IKEA laundry bag JÄLL is actually the only real option. For less than 5 euros you have a dust cover with an exact fit and enough space for the filament hose on the top. You do need to remove the metal stand and make a cut on the back because the filament won't fit.

I actually took on the tip from reibuehl and bought the JÄLL, took the stand off and it is a perfect fit and looks like it was made for the Ultimaker. Thanks!