Don’t have a link handy though one of the rv supply sites, Camping World, sells a foam square ‘padded’ insert. That is about 2 to 3” tall. I actually just left the plastic wrap on it on the two or three I purchased for use down in Florida. I just pushed them up and it is a snug fit and figure will keep the heat out. Ok, found it, part # 106744, Vent cushion strap.
https://www.campingworld.com/vent-cu...ap-106744.html
Sadly I have only taken my 21’ jayco skylark with front bath out one time this year. Was going to do it this weekend but between gas to tow 4hrs each way and two day rv park fee I said screw it and will just do a day trip with a friend in the car. I know, I feel bad even typing above.
I am now retired, no less, just have to force myself to get the rv out for a trip. Will be dam hot starting next week here in florida though. Just got an application for Coast to Coast so maybe that will make it less expensive to stay a rv places.
Also, sadly, when mine was made back in 2011 they did not add wiring for a fan in the ceiling where the center skylight is.
It has led lights in the ceiling and the bathroom has a powered fan. I infer I need DC powered wiring, would run off the charged rv battery instead of shore power is my guess. So would need to see where I can piggy tail off such wiring in the rv near the skylight I want to install the fantastic fan into. It cost a small fortune to hire someone to do this type of work it seems.