Metal 78mm: https://www.ebay.com/itm/334247935022
Ceramic 74mm: https://www.ebay.com/itm/334625998660
Ceramic 55mm: https://www.ebay.com/itm/334626005389
Metal Sawtooth 78mm: https://www.ebay.com/itm/334626013345
Metal Sawtooth 55mm: https://www.ebay.com/itm/334626033690