I have a Hugh (model Cabot-Elite) wood stove. Bought it back in 1991 and I know the company doesn't exist under this name anymore. I am in the process of replacing the inside firebrick wall. When I removed the firebricks I found what I would call a fire/heat shield wall which is also cracked and broken. These pieces are located on the back wall and the bottom wall. Does anyone know what this is called and where I can find replacements? Also would like to know if I put these shields back (as they are now) is it safe to use the stove?