I have a 1988 23 ft Bayliner Cierra 2455, (small cabin cruiser). The head is a Bryden 59128-0000. The manual pump flush on the porcelain head does not pump. Is there any possible source for a pump seal rebuild kit available anywhere, or if not, will any type of replacement pump fit? I would rather fix the old pump. Does anyone know, before I take it apart, if I can maybe match up parts, (seals), at Ace Hardware or something like that?