FreeRaspberry Pi 3B Case for 30x30mm Fan
Printables
6 model
Free
Free90 Degree corner bracket for 30x30mm Alluminium T-Slot extrusion
Thingiverse
FreeMKS Pi 30mm fan mount
Printables
FreeTurbine 30x30 by SHK
Printables
FreeEasy Ultimaker 1, 2, 2+ – 30x30 Blower Fan Upgrade V2.3 (No Support, Bolt-On Design)
Printables
/https://fbi.cults3d.com/uploaders/18312646/illustration-file/07ac5136-5938-49e0-a28d-a2aa288a4d7d/2.png)
$3,9110x 35x30mm hex base with old tiles surface (battletech etc.)
Cults3D