Hi, I'm in the market for our first wood stove. We are going to put it in front of a fireplace with the stove pipe going up the chimney so we need a reversible (which seem to be mostly cast iron) or rear flue outlet. I like the idea of the ecobricks and biobricks and want to be able to use them. So what are the companies that allow bricks that also have a reversible or rear flue outlet? Thanks!