How can I get a divorced certificate in san bernardino county?

10 years later my fiancee ex wife got in touch with him. He asked her for a copy of the divorced certificate so that he and I can legally get married. She said that she has it in her closet and will look for them. He asked her over and over again for the divorced certificate. She fefuse to give it to him. Is there an address or a number to the san bernardino county courts to obtain a divorced certificate? He wants to see it before we marry. I would also would like the number and address to the san bernardino county clerks to obtain a divorce certificate. Thank You.