Pi 3B+ Mini Desktop Case Parts.

thingiverse

I've yet to test fit the duct part, which might cause conflict with the Ice Tower brackets. You may need to trim it for a smooth fit. I was planning to test fit everything and take better photos, but users are eager for updates, so here's a sneak peek. To assemble this project, you'll need parts from the Pi4 version. Check out this thing on Thingiverse: https://www.thingiverse.com/thing:4249203 This design is optimized for 40mm x 10mm fans and allows for color-changing LED fans. If you prefer a Noctua fan, it might work too, but be aware of excessive cable length. Consider shortening the cables and adding dupont terminals to keep things tidy. Acrylic sides or tops will benefit from this modification. For reference, I'm using an Ice Tower: https://www.amazon.com/dp/B07V35SXMC