Our house had an Austroflamm Integra insert pellet stove when we purchased it. I found the paperwork from when the previous owner had it installed, there is no date but it looks pretty old. We have had no problems with it over the last 3 winters, but just today while I was starting it I noticed smoke wafting out from where the glass meets the metal on the door frame. The smoke was only comming from the top edge, and when the fan started running the smoke leagage stopped. I assume there is a gasket or something around the glass. Where can I find an item like this for such an old device? If I can locate the right gasket is it something I can change, or do I need a pro?

Thanks for any assistance!