WARNING: Since this adapter deals with electronics/heat, use it at your own risk.
You can get the fan here: Amazon.com: UTUO Variable Speed Blower Fan, 110V 120V 220V AC Powered 120mm x 32mm air Exhaust Vent Cooling Radial Centrifugal Flow Adjustable Centrifugal Blower Fan with 3 to 12v DC Speed Control Dimmer Switch : Electronics
Printed on PETG for better heat resistance.
Printed on a Creality K1C
The author remixed this model.
I adapted the fan outlet size and added a bracket to mount it. Used the same bolts and mounting features for the tesla card.