This is a small remix of the excellent work of KalleKnall which is the reason I just added his description here. All credits belong to him and he was just too kind to give me a step file to make the adjustments you need for the dual nozzle fan version, created originally by RosyRL (https://www.thingiverse.com/thing:3697665) and optimized by SadMoney (https://www.thingiverse.com/thing:4051777) or here (https://www.prusaprinters.org/prints/14312-mk3-dual-fan-mount). Finally I added a cable channel on the other side for those who want the air sucked from the bottom.
KalleKnall description:
I've just designed my own small Stepper Cover to cool down the Stepper to an save Temperature. It's to avoid smelted Filament because of a hot Gear. The Cover snap's onto the Stepper Motor.
It produces a small but enought Airflow to do this. I don't want to plug a big Cooler on my MK3 ;-).
You can follow me, or my MK3S with my Mods on Twitch.
https://www.twitch.tv/dasschweigenderlamer
Print it UpSideDown in PETG. The Cable is hidden to have a nice look.
What you need:
4x M3x14
The author remixed this model.
Dual fan version