I want to cook ribs tonight. I read on this site of indirect cooking with fire bricks. I bought my BGE at Cherokee Hearth and they did not carry fire bricks and did not seem to understand why I wanted them. I bought regular size fire bricks from Maner Builders but the bricks are 4x9x2 and they said too hard to cut thiner. Noticed on site the thickness of 1/1/4 bricks were used. Is there any place I should look for proper size? Thanks for any suggestions or help.