it takes long time print to holder. I make it with mdf wood. just draw fan holder and it is simple.
Mdf has 3 mm thickness. You can cut size whatever you need.
My mdf size is 215-140 mm . I use mks gen v1.4 , two mosfet
Fan holder can be used for 120 mm fan too. one piece fan holder is enough if you want you can print two piece. dont forget make mirror x on slicer.
what you need:
m3 12mm and m3 nut.
m5 10 hexagon socket round head
1-1.5mm spacer. you can print from: