This is the Bosch GCM12SD Zero Clearance Insert 2 Piece found it on printables from @KevinScott_400321 printables.com/model/577611-bosch-gcm12sd-axial-glide-miter-saw-zero-clearance
I have this saw, approximately 4 years old - printed off this zero plate however the holes are not in the same spot as on my saw.
In my case, screw holes are condensed across the length, substantially. To use, I will have to drill and countersink the screw locations.