There were no full-scale mockups built of the craft made for the original movie, and the ones from the TV shows are probably still owned by Paramount.
I'm surprised there aren't any X-Wings, A-Wings or Y-Wings out there. And where the frak is the Millenium Falcon?! 
I think you mean MGM.
But you people are missing the point of this.
There WAS no air show. It's all clever photography and CGI. In some shots, it's fairly obvious. For fraks' sake, read the histories of the ships, it's clearly fictitious.