I've had a couple of quotes from photographers in Punta Cana and both the cheapest quotes are comparable with the gold price quote for Ocean Blue.
I'm still not sure who i'm going to go with (I too am getting married at Ocean Blue) but its worth having the info to make a decision. Here is the website for one of them: Juan Guzman-Wedding Photographer in Dominican Republic
I'm trying to find the other, so as soon as I do I will post it for you.
I have just been to the link above (Photosouvenir Punta Cana, Wedding Photographer Dominican Republic) and this was the other quote I had.
Hope this helps