Just unbolt everything and replace it with whatever fits. I’ve replaced 2 dinettes with reclining loveseats. No problems. Until you trade it in. I took a $3k hit in value because I sold it on Craigslist.
This one was theater seating with a center section that made it too long. I cut it out and bolted each seat individually to the floor of the slide-out.
Search for a wall hugger, they typically need only 3-4” of wall spacing to recline.
RV specific will be more expensive than house furniture. Most stuff comes in pieces, so you can get em through the door. Measure first!