Seems to me a place to start is with the Bahamas Air Sea Rescue Association (BASRA)....contact them, tell them of your plans, and ask for recommendations for hiring a boat/captain and a plane.
You might also wish to contact Carolyn and Nick Wardle in Nassau. They are the Bahamas Cruising Station for the Seven Seas Cruising Association (SSCA), and have excellent access to BASRA.
Seven Seas Cruising Association
Tel:+242 362 1574, Fax:+242 362 2044
Also, if you haven't already contacted the USCG SAR Center handling this incident, now would be a good time to do that in order to find out anything they have -- surely, during their search they at least located the boat -- and seek their recommendations for a private search.
Others may have specific experience which would be helpful. Hope they will chime in.
RE: location, it would appear that the onboard transponder was working as late as 0400 yesterday (Friday the 19th), showing this location:
N26° 22' 41.3" W76° 58' 48.9"
2010-11-19 08:20:49 UTC -4h
Since as yet we have NO DIRECT INFORMATION FROM THE CAPTAIN, HIS WIFE, OR THE OTHER CREW MEMBER, we don't know the sequence of events. Presumably, they could provide some helpful information. For example, was the boat capsized and disabled by wave action BEFORE it hit the reef? WHERE was the capsize in the dingy/liferaft in relation to the boat???? Is it possible that waves and currents could have washed Laura a long way from the boat? Is there any truth or significance to the report that a life preserver (from the boat???) was found onshore about a mile south of the boat???? Anything at all which could tell searchers/rescuers more about the possible locations to look for Laura. A thorough debriefing could turn up clues which could be helpful in the search.