Back in 7/26/13 I bought 3 toilets San Raphael K3597-0 Now I am having problems with one of the toilets, called my plumber to repair, the plumber told me that he was unable to fix it because this toilet was discontinued, and he was afraid that if he try to repair it could exploit. If this the case, does Kohler have a replacement kit to fix this problem. Ferguson the dealer from whom I bought the toilets told me to call you, can you help me? User's recommendation: Kohler is an excellent company.