This 3D printed enclosure (three parts: left, middle, right) holds two 8 module Max7219 display boards. Included are the .stl files and the Fusion 360 (source model) .fd3 file.
It also requires a front piece of red acrylic plastic 1/8" thick, cut to 45mm x 533mm which fits into the front of the enclosure; I sourced the red acrylic from a local plastics store ( http://canusplastics.com/ ) who said they are happy to take small orders.
Created in support of this project: https://hackaday.io/project/170281-voice-controlled-scrolling-message-board
The author marked this model as their own original creation.