Bongo Fury

We have returned from our first trip of the year and need to do something different with our rock n roll bed.
we no longer use this as it is so uncomfortable, we sleep in the awning.
The rock n roll bed does not even provide any comfort when we are inside watching TV.
My wife suggests taking out the bed and install 2 seats.
Any ideas which seats may fit as we have a full side conversion?

We found that after a couple of years good use the foam needed replacing, now all is fine again.

I chopped down a standard mid seat to 2-bums wide, and moved the o/s floor rail over so I could have seats which were nice to sit on, and have a folding wooden panel which covers then for sleeping, with a folding mattress on top.

Currently experimenting with the same seat, a fixed wooden shelf behind, and an inflating mattress as the folding one got a bit 'dead' after 2 years.

I could probably just replace the mattress like-for-like, but I fancied a wee experiment to see if I could improve storage space. looks like I can, but the inflatable is maybe a bit too thick (9")

Photos of the seats / bed etc here

I agree on sitting comfort (as a bed mine's absolutely fine). My seat is too upright. I'm thinking of moving the locking catch forward to add some more "lean" into it.

Thanks for your input.
MOT is due within next few weeks so will delay any decision until after then (finances may be stretched!)
Cheers