Where to get a good smooth walled 6 inch flex liner kit? I need to liner a 9x9 block chimney. The liner will need a t to get to the stove. Right now it has no liner so I will also need an insulation blanket to get 0 clearance on the outside of the chimney as it's an interior chimney to the house. I see that Lowes/Home Depot sell liners but I'm not sure of their quality?