I did this a while ago. It was quite difficult to get the border right.
To customize this you have 2 options:
Whatever floats your boat.
If you don't want to fiddle around with OpenSCAD, you can use one of the many (yes, 156 of them) pre made empty plaques and use Prusa Slicer or your favorite tool to add the text.
The author marked this model as their own original creation.