2008 kz coyote 23cfk

I have a friend that I am trying to help with no luck. He has a 2008 kz coyote 23cfk with 3 fold out beds and is looking for the rubber seals, have been looking for quite sometime on the internet and have dad no luck. My wife and I have been looking with no luck, so I thought about asking someone here on the trailer forum for help.

Thank you