I put 1 in the back of my jeep because the shocks come up through the back now and the bench didnt fit.I used a pre teen seat from PRP its 3" shorter front to back and height wise because of head and leg room and its always one of my kids back there any way.
Yea, I saw a pic of factory buckets installed in the back, the passengers were looking at the rollbar, I'd say it could be done if you found some junk yard low buckets out of a ??
I was wondering about not having any side support and passengers sliding out of them, and the room is so small back there they will probably touch in the middle anyway, making it a bench seat with a seam in it now.
Thinking out loud here my wifes explorer has a 2nd row that is 40/20/40 split, and they are all separate mounted (not attached to each other) I wonder if you could us the 40/20 portion...something like that would be low backed, and able to recline.
When the kids are older and it strictly mine to play in and not haul kids in I planned on mounting a single seat in the center (like a silverado's drivers seat, it has built in armrest and seat belt) so I could mount big 40mm grenade ammo cans as storage "pods" on each side