It's a remix from renbas "Anycubic I3 Mega Improved Hotend Fanbox" (https://www.thingiverse.com/thing:2919245/remixes) and ronnies Anycubic I3 Mega
...Zeig mehr Remixed Fanbox for BLTouch (https://www.thingiverse.com/thing:3025361).
I merged the droite and gauche (both side) with the grill (front) to reduce some weight and time for assembling.
I've drilled most of the 3 mm holes to fit the screws.
You need the following thingies:
https://www.thingiverse.com/thing:3025361 (part fan duct)
https://www.thingiverse.com/thing:3025333 (bltouch mount)
Material:
4x M3 nuts (case)
2x M4 washers (fan)
2x M4 nuts (fan)
2x M4 x 20 mm (fan)