Drawn with Solvespace, original 3D files (*.slvs) included. No Support Material needed. Auto Leveling Probe can be used with mounted fan duct.
Update 01.05.:
Since the comment from user ggiavelli I thought about another solution and came up with version 2 today.
More clearance around the fan duct
Larger inner diameter for enhanced airflow
The opening on the front side is wider, to get a better view on the nozzle
The venting holes are closer to the nozzle
The hole part is much lighter due to thinner walls
I add "v1" to the name of the first version and uploaded the new with prefix v2, the pictures are now from v2, for pictures from v1 see the pictures from others in "Made".