I can help you only partly...
answer your questions. I know these records are public and are all kept in the Oficialia Del Estado Civil. You would have to go to the municipio where the divorce was granted so I guess this means the Oficialia Del Estado Civil in Puerto Plata. I think, but am not 100% sure, that anyone can access copies of this information so you could probably do it for your buddy. You mentioned that the divorce was granted in 1992-1993. Each municipio enters all the pertinent information about divorces in a public registry called el Libro de Registro de Divorcio. There are many volumes of these books, each given a number. It would be faster if you could provide information about the book no., folios nos., and Acta No. This information is listed on all divorce papers. If your friend has a xerox copy of his divorce papers, this would do in providing exact information for the search. If you can't, that means a search of all volumes from 92-93 would have to be undertaken. This might be more expensive since Puerto Plata would have a lot more books than a small rural municipio. As for costs? I really have no idea of the current prices but I'm sure Fabio Guzman can answer all your questions precisely. Good luck.