I printed with PETG+ and painted liquid isolating temp resisting rubber on top and hotend facing parts of the fan duct. It even does the job of glue to hold a led from an ledstripe in the led seat.
Printinfo:
Use Classic wall generator as there are small diameters for the airflow
Remove the below mentioned extra support walls, so you are still able to print with tree support if you want to.
The magnet holes are made bigger and longer to support some magnets that do the job correct that the to small original ones don't really do.
Use melt screw sockets in the holes for eddy
Z-Offset same as for the original and in the images attached

The red parts are support walls only. Please remove them.
The author remixed this model.
Stronger, smaller, stiff sit, supports bigger magnets and optimized airflow and fanduct.