I haven't tried it out on my stove yet, but I am thinking of getting some steel to cover the window to protect it when I am not interested in watching the fire.
I would think that the metal that is punched out to make the opening for the door could be used.
A couple of clips at the bottom for the bottom edge of the cover. 2 slots in the cover that would slide onto the clips at the top.
The clips would connect to the door using the bolts used by the existing window clips.
