Download the remix files here then print the remaining files from the link below.
Connect the fan to PB0/HE1 if your running Robin Nano v1.2
Add command below to Klipper to run with hotend fan settings with the 120mm.
[multi_pin my_fan]
pins: PB1, PB0
[fan]
pin = multi_pin:my_fan
Remaining Files
https://github.com/VzBoT3D/VzBoT-Vz330/tree/master/Assemblies%20BOM%20and%20STL/RSCS
Fan I used
GDSTIME Brushless Radial Blower Fan High Speed 24V DC Centrifugal Fan 120mm x120mm x 32mm
https://www.amazon.com/gp/product/B00ZFPDLE2/ref=ppx_yo_dt_b_asin_image_o05_s00?ie=UTF8&psc=1
The author hasn't provided the model origin yet.