5015 Blower Fan Shroud
thingiverse
I made this for my RPi4 to help cool things down. It should fit most of the cases that provide for a 30mm fan like the case pictured. https://www.thingiverse.com/thing:2407893 I recommend custom supports for the duct otherwise 75 degree overhang @ 10% density. I printed this one on a Chiron with a .8mm Volcano at .32mm 50mm per/sec 50% infill with PETG. Anything sane should be good.
Download Model from thingiverse
With this file you will be able to print 5015 Blower Fan Shroud with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on 5015 Blower Fan Shroud.