That's a real guesser. But if one
fiberglass airstream was made, the molds had to exist somewhere. As California was the molded
fiberglass building capitol of the world in the 60's-70's I'd also hazard a guess that the fiberglass airstream was built at or near the long gone Santa Fe Springs Airstream plant, not all that far from where this one is now located.
But that's all a W.A.G.
I am guessing this one would have to be towed. I am about 100 miles away but, if it were running I'd be there in a NY minute..... That would be a super project to build.