I was wondering if anyone is familiar with the profile 30. When i was moving my pellet stove to clean it the exhaust housing along with the exhaust duct came apart due to rust. I found the exhaust housing online but i can not find the exhaust duct to connect to the exterior pipe. There is a quick disconnect 3" part number 12050093 but the pictures are of a square piece of metal and the housing is rectangular. Any help would be appreciated thank you