This is a simple print to hold a standard 64x32 LED matrix. https://smile.amazon.com/gp/product/B079JSKF21/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1.

The case features 4 tongues that reach out on the inside and hold the matix using the threaded inserts in the matrix and M3 hardware. If your board does not have those then you may be out of luck. The case also features two holes at the bottom to mount a usb-c breakout board to using M3 hardware. The case is approximately 6.5cm deep.

I have provided the Fusion 360 file if you would like to remix it. Print with the front on the build plate and supports for the mounting tongues.