I have an old earthstove pellet stove. The stove seems to have an option of venting out the top, or the side/back. When we moved in the stove was vented out the side/back through the wall to the outside, no problems there. The top vent has a plate that has two bolts holding it in place, there seems to be a fiber gasket material as well. The gasket material is in really sad shape, where can I find this gasket? Also the stove seems to produce a great deal of dust in the house. I replaced the rope gasket on the front, but it did not seem to help. Any thoughts on these two problems?