I have a few Danish-designed lamp shades from 1974. They hung in the University Centre of the University of Guelph for 38 years until they were replaced last summer and sold at a charity auction in the fall. There is an article here: UC Orange Lights Go on Sale
that describes them.
I'd love to see these used in a vintage trailer. Each lampshade is about 13" in diameter at the bottom, 5" in diameter at the top and 9" tall. They are all orange. None of them are wired, but I put a bulb in one for the photos below. They are rated for up to a 100 watt bulb.
They all have some small scuff marks on them, and I didn't realize how dusty the one in the photos was until I actually looked at the photos! They shine up nicely with Armor All or similar plastic restorer, but they are not PERFECT.
Our trailer looks pretty orange in the photos, but in reality I would describe is more as a warm glow than the orange appearance in the photos. I don't actually have this installed in our trailer, just put it up temporarily to see how it would look. I'm not even sure of the logistics of having a hanging lamp in a moving trailer - it might involve putting it up each time you stop.
I'm not looking to make money on these. I figure $20-$25 would cover the purchase cost and shipping to anywhere in North America.
Let me know if you think you could use one.