I am not convinced that vent free is a good thing. You can purchase a real heating fireplace or stove that is direct vent, right through the wall. These are safe. I am not convinced of the safety of non-venting anything. See this link http://www.jlconline.com/jlc/archive/energy/vent/ (2 pages long) for some interesting info. If you want the brick look with a pre-manufactured unit then just get a plain front model with glass opening and find one that allows you to face it with brick. You should be able to find a unit that doesn't have any fans built in with louvers so that you can put the brick right up to the opening.