We bought a house with one of these, but the original front window and frame were replaced with something homemade, and the glass was out of it when we got it. We used rope gasket and some fireproof caulk, and then it just is kind of pressed onto the opening and doesn’t utilize the tightening knob holes. The glass has since cracked. I’ve found aftermarket glass online, and even have a local place to get that, and also found the brass knobs, but does anybody know where I can get a replacement front glass holder frame. We like the store, and will probably replace at some point, but want to use for now and will keep for another use when we get something new for our house.