I am sure you can purchase replacement stems and seats for that fixture. Although when working on other peoples faucets we usually replace the whole stem to be sure everything works good, you can replace the bibb washers on the ends of the stems. The seats in the faucet body that the washers compress against can and should be resurfaced or replaced when changing bibb washers. It looks like that stem was recently repaired with a beveled washer. In the US beveled washers are rarely used by original manufacturers but they work ok. If the hot side stem looks to be in similar good shape you can just continue to repair the stems and seats to save a lot of money. If you choose to repair use flat washers.
Last edited by SHR; 03-07-2014 at 03:02 PM.