This isn't going to help with 'finding' what you're looking for, but - in response to your query about 'experience' - I was thinking of these only the other day. When I was a lad in the 1940s, we had one on either side of the fireplace...very simple, wooden 'armchairs'...which folded down to make single beds. Very handy they were, too. If I could find such an item, I'd buy it tomorrow. The ones linked to by hc4361 above are wonderful, I'm sure, but vastly more bulky than the ones we had all these decades ago.
Good luck with your search.