Just acquired a countertop pizza oven which seems to work fine, but is missing the deck stones. It is a model ES-216. Who manufactured this is still a question. Apparently the only two manufactures of a countertop oven with this model number are Harvic Manufacturing Corp. (1955) and Connolly (?). The required stone size is 16 7/8 in. sq.(or 16 3/4) x 3/8 in. thick. Cordierite would be the preferred material. Anyone know where I can find such stones?