if you have the storage arm rest on the drivers side nothing will really fit on the passenger.. now if you have the standard one you might be able to see if you can buy another one from the parts department, and put it on upside down on the passenger side there should be enough room for that..
the back seats i think would be rough, cause it would make folding the seats against the wall difficult. you can always add a removable cube shaped cushion between the back two seats which both people in the back could rest on, and it could be tosses aside when you need to flip the seats up.
no, you can't get an armrest on the passenger's seat. An aftermarket job probably would require some serious labor. I think that the "accessory armrest" that szacherau installed covers most of the width between the seats. Hey szacherau does it??? Some pictures details about the compartments would be nice too.
The armrest is much wider then the standard and it only leaves about three inches between it and the passenger so my wife is always using it with me. I will take some shots today and post them as soon as I can.
I installed the large armrest this week. It's wide enought for the driver & front passenger to comfortably share. As noted in earlier post, you can set it for different angles. Very comfortable, and much more useful than standard armrest. It has removeable dividers so stuff won't flop around too bad when you raise it up. Only drawback is that it gets in the way of the drivers seatbelt latch. You either have to raise it up, or reach around it to attach/detach your seatbelt.