I have remixed a Model from Thingiverse to use a 80mm Fan for Stepper Driver Cooling and reducing Fan Noise on my Sapphire Pro.
I have used this 80x80x10mm 24V Fan wich is really quiet in my opinion.
I glued in the m3 nuts to attach the fan after mounting the frame.
The 2 legs on the Wall side (right side on the Picture are shorter by 1mm, its not needed to screw in all 4 Screws.
I have used 2 M3x40 Screws for replacing the 2 Mainboard Screws.
The Modell is a Remix from Thingiverse.com
The author hasn't provided the model origin yet.