New to this site,,, very good people and good answers here.. I am in need of some replacement firebrick,,, size is 1.25X4.5X13.5.. These are the bricks that stand verticle in the back.. The ones that lay flat on the floor are 9 " in length.. I could cut some and hope they stay, with cement, but would rather put in one solid brick.. Any ideas for these longer bricks? This is a great sit, thanks in advance.. 13/14 wood already done.. rasp21.