I have a Treemont HC 1000 that is about 30 years old. I need to replace the gasketing on the upper and lower side doors. The manual doesn't list the size of the gasket, but instead says says "See your dealer for a gasket replacement kit". Lots of luck doing that! The groove in the door is about 1/2" wide and 1/4" deep. Does anybody know what size gasket this stove takes? Is it 1/2" rope or ......? Thanks in advance.