As common as standard troop seats are, I'd suggest you just find a set. You are in for some serious modification. The dump truck troop seats don't fold down for use like the troop seats on a cargo truck. Instead, the seats are actually removed from the uprights (when you are installing them, you literally are standing there holding the entire length of seats in your hands and they are removed from the seat back section). If you look inside the bed of a dump, you will see slots near each stake pocket. The dump truck troop seats are re-attached there to form the seat.