In order to make something like that work, you have to have a large enough group wanting to dive on the same day. For people diving as individuals, pairs, or threesomes, the cost is prohibitive.While I haven't dived in that area recently, I am skeptical about the lack of choice. My understanding is that there are a number of 6-pack charter boats in the area which typically cater to fishermen but will also take divers out on request. Just get together with a few buddies and hire one of those for the day, they'll take you anywhere you like. Is that no longer an option?