I have an old Sierra Model 1200 stove from the 80's. I need to replace the glass, and door gaskets. I was advised to look at the Jotul universal gasket kit, which I have done. I still do not know if it will fill my need. My brother refurbished the entire thing for me, but tossed the old gaskets, and I can't find ANY info on the gasket sizes I need! Any help will be greatly appreciated... I'd like to get this done before the cold Northeastern winter gets here! Thanks in advance