Was just informed that the Micarta would present some issues with cutting so thin, potential shattering, and a special way that it needs to be waterjet cut would raise the price significantly, close to $40 a plate NOT including material. In the future this may be an option, but for now they've presented me with an alternative material that will be very inexpensive similar to FR4, but has many of the same properties as Micarta. It's a polyester based "plastic" made in the same way as micarta (heater then pressed), with a different resin used as the binding agent, typically used as shim stock.
Will be offering these in a clear color with the buy.
Should be similar to an acrylic plate, but will hopefully sound much better.