The first couple of years' production of Airstream motor homes had the steel end caps. The first year they looked just like an Argosy motor home, the second year, they were painted silver. By the third year they had aluminum segments on the ends.
So, if you really, really, REALLY wanted it to look like an Airstream motor home, you could paint the thing silver, and install some Airstream badges on it. It would definitely be a one of a kind.
See how long it takes before someone figures out what you did...