Hi Tom, if you want some comfort in the cabin you should look for someone to reproduce them plus the filler cushion. You should have a porta-potty in the cabin, I keep ours hidden under the filler board holding up the filler cushion. Some of the later models put the porta-potty on a slide out under the helm floor. Anyway, if you ever have a female onboard, they'll appreciate the comfort.
When you have the whole cabin bed complete its a good place to store rods and stuff.
One thing I would look at is how the cushions got wet. Windows leaking? or left open? Does your cabin have a vent above that is leaking? My Explorer didn't come with one, I had to find one and cut it in.