I haven't done this change but many others have. Recpro seems to be a popular choice for the theater seating. They have several choices. If you search for theater seating on this forum you'll probably find lots of useful threads. Here's one that gives a lot of the details: https://www.jaycoowners.com/forums/f...ner-83634.html
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2020 Jayco Greyhawk 29MV/2021 MINI Cooper toad
The link that dvspl lists has a whole bunch of info on this and as mentioned Recpro has various sizes to fit various space. I did some research on this for mine and while it got put on the back burner right now it is a reasonable do it yourself job.