I really despise how many trailers, including ours, comes with a bathroom door that leaves huge gaps at the top. I want a private bath, not a highway rest area toilet stall.
Years ago when we were getting work done at Coachmen under warranty, I asked if they could get us some scrap pieces of wall paneling. Something they would just toss anyway. They gave us a 4x8 sheet of wall paneling and one of wood paneling that matched our trailer. Nice.
This year finally got around to building a header for the door. I got the trim pieces by taking them off from portions of the trailer no one sees (in the front closet for instance).
I wanted it to not be noticeable. Much better for me.