Hi guys. I'm working on a rear bar as well. I decided to go with a bar that is one piece, and does bolt up to the seat latch area, with plates skinny enough so you can retain use of the latch mechanism. I've currently got an order for the mounting plates to be laser cut, and will be selling these shortly. I didn't know there was any interested for bolting these to the seat latch area, until I read this post today, August 9th. I'll learn to pay attention one day! Catch you later folks.
-Aaron