I'm having some problems with finding the Clay liner. I'm going to make some more calls today to find it. The problem is that I didn't think of this before and now have a smaller area to place it. After I place some bricks on the 2.25 (side) I only have a 6" opening to fit a flue. Can I create the chimney and then line it with regular clay tiles? If I can go that route I can go with a 6x12 liner.