Pixies:
https://www.tindie.com/products/connornishijima/pixie-chainable-dual-57-micro-led-displays/
Press fit inserts:
https://www.amazon.com/gp/product/B089VKTLY4
M2.5 Screws: (use the 6mm ones)
https://www.amazon.com/gp/product/B07F14J7X8
Make sure to modify the section for the press fit fasteners in your slicer to have 6 walls.
The author hasn't provided the model origin yet.