A good glass shop should be able to make them out of glass for you. Make a cardboard template for them and they can cut and grind it to fit. All the edged on my desktop glass are ground down to a slight bevel.
My office here at home is covered in a glass top, of unusual shapes.
I brought a glass shop this drawing, and they cut and delivered and put it on the desk. Or even easier, bring them the meter, and have them cut it to fit.