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It's interesting to see that you like the Nov 1-13, 2017 Banda/Raja Ampat (Sorong-Ambon) trip with La Galigo Liveaboard. That trip is the reverse trip of my trip, Nov 20 - Dec 2, 2017 (Ambon-Sorong). I worked with the owner, cruise director and a DM who knows a lot about Banda Sea, to put together the detail itinerary. Normally the boat will operate in Raja Ampat from October to April. So, to bring the boat to Ambon from Sorong for my trip, they set up the reverse itinerary.
This trip is pretty popular. This year may not be a good time to go to Banda Sea due to El Niño. Hopefully, next year would be better with La Niña for more the hammerheads to gather around in Banda Sea. Two other groups were tried to book my charter last week, more than a year away. So, I would book it early if I were you. If La Galigo is no longer available, I think it is still early enough to book other liveaboards that plan to go to similar passages, for example
MV Samambaia.