Front corner of Jayco 27BHHere is my picture file. Hope it works. Let me know if it doesn't.
The gasket on the left upper corner looks a little bit wonky as compared to the one in the upper right-hand corner, as you'll see in the pictures. However, there is moisture on the uphill side so moisture would have to go uphill from this gasket. I suspect that is not the issue.
I put a damp rid thingy under the bed. It's not the bucket but instead the one that has a large calcium chloride disc standing up and has a collection container for moisture under it. It probably had 2 oz of water in it since Saturday. But it was otherwise completely dry under my bed.
I'm headed to Lowe's or Home Depot to see if they have that model in stock.