We just used Val from Turks and Caicos Reservations at http://www.turksandcaicosreservations.tc/. He was extremely pleasant to speak with on the phone and is going out of his way to try to get us a room in building 3 at the Sands. I highly recommend him!
He also throws in a perk based on the trip that you book.
We are going to be there from 3/20 to 3/30 so if anyone wants to get together let me know!