Make sure whatever you buy fits in the provided space as well as the through the door.
https://www.recpro.com/recpro-charles-60-rv-jackknife-sleeper-sofa/?gclid=Cj0KCQiAvc_xBRCYARIsAC5QT9... Compare prices from RP as well as Etrailer . Once the chairs are removed I assume you will have a clear and empty space with no water tank or anything else to interfere with a new sofa install.
The REC Pro sofa fits in a 22" rv door.
Use your google or servers search bar and type in
'rv.net, jacknife sofa'
you will get better results than trying to use the rvnet search bar.