The Kanger Protank(2) coil assembly consists of: Base, coil (Kanthal wire plus silica wick), rubber grommet, pin, cap, and washers. After a number of rebuilds (seems to be an average of five), the rubber grommet that holds the coil to the base is deteriorating with cuts that are caused by the wire and charring due to the coil heat. It seems a shame to throw the entire assembly away because of a worn out grommet. Does anyone know if just the grommet can be purchased?