This is version 3 of my part cooling fan for the SnapMaker 3D printer. It attaches to the accessory mount that I designed:

https://www.thingiverse.com/thing:2816454

It is designed to be used with a 50mm blower style fan. You will need to power this fan externally. I had to completely ditch the loop around the hotend as it interfered with the stepper motor cooling fan. You should be able to print it without supports as long as your printer is decent at bridging. As always I have included the STEP file.

EDIT As was pointed out in the comments, you need to move the screen from its default position or you will hit it when homing the Z axis. I did not realize this when I designed this as I had already moved the screen.