Front Bunk Door Woes - Finding the Right Parts

Need more info.
Seals are found in zoos or the ocean.
Thing-a-ma-jigs or thing-a-ma-bobs?

You need to be more specific. What brand and model do you own? Which seals and "things" do you need?
Unless you can purchase from the manufacturer you quest will take research of the google variety.
It is doubtful, to me anyway, that Rv manufacturers design their own seals just not the volume to justify one off design.
Trim lok seemsto make a variety. Check Grainger and Amazon for matching seals.