I would have a complete set of seats if you could use the Dark Palazzo Gray (looks Black) seats. I even have some takeoff front seat cover to match them. In the Charcoal Cloth I only have a 54" 3 passenger seat, 4 of the 36" seats (which you would need 2 of them) and the 16" single seat by the side door. Then one of the 3 leg seat that would go over the RH wheel well for the 4th row. NO 5th row seats.
If you went with the 12 passenger seating, I have the LH & RH 31" seats that make up the 4th row.