I am looking for laser cut cads for my prusa i3?
This is not exactly my part, but the holes place are true. I think if someone measures the bed dimensions( for me it's 21.9mm * 21.9mm) and orders a plate in this size, he can also make holes later with drill(I did it before for another part of my plexi to attach the power supply).

https://www.thingiverse.com/thing:1310778