I'm not sure if this will help you but here goes. I got married in Puerto Plata in May 2011 in a beautiful banquet hall. The man who catered the affair is a chef who works at a resort in Cofresi. He did a wonderful job in all from the food preparation to the presentation i.e. fruit(melon) carving (to look like a swan) to the serving.
The chef along with me and my wife decided the menu. We had two roasted young pigs, lambi, and fish, along with pasta salad and a vegetable medley and appetizers of shrimp, fried conch(lambi), cheese and crackers.
I thought the price was fair as he is a friend of my wife's girlfriend but you have to negotiate that. The down side is I had to take him to all the stores but that also meant I knew all the prices for the food so it worked out well for us.
Let me know if you're interested or have any other questions. Good Luck!