Hello Kevin
The grills for the L300 and L200 are completely different. The L300 had a box frame with streched fabric. It was 3 dimensional and used pegs to attach to the front. The L200 has a sculptured foam grill glued to what is essentially a custom aluminum door/window screen frame. So its entirely possible the frame is intact but the foam is normally long gone. The frame fit inside the enclosure walls. Remove an L300 grill and you have a flat baffle, remove an L200 and the drivers are recessed several inches from the cabinet edge.
Rob