I have two side by side "Ceramic Fiber Boards" on the inside top of my woodstove and one of these boards has broken. These are about 1/2 inch thick, white, and very lightweight. And they cost a young fortune to buy from the woodstove manufacturer! Question: Is "Micore Mineral Fiber Board" the same thing as "Ceramic Fiber Board"? I can buy the Micore in a 4 x 8 ft. sheet for about the same cost as two boards to fit in my woodstove.