I have a Russo wood/coal stove - came w/house I bought a year ago. Glass on door has 4 bolts and gasket, 2 of the 4 bolts are broken (too short for a nut)-broken bolts are on the same side-so the top of the glass is loose. I took it to the nearest service place, they said they couldn't replace the bolts-looks like they are part of the glass frame. Anyone have suggestions on what can I do to get better seal?