I made the model from scratch, but based it on the original dimensions from trstn so it fits the box. The file shows 3 colors. 2 for the grid and a 3rd internal layer to hold them together, but you could easily change the center layer to be one of the others.
Recommend printing at .1mm height as the model is only 1.5mm total.
Model and gcode are for half a board (4 parts).
The author remixed this model.