A Hoover Celebrity with wheels would be a good find! Cant remember what the americans call them though.
There was a shark cylinder on ebay a few years ago that shouldn't have been. This was before Shark started to be sold in the UK, it was a factory testing mule that got sold. A collector bought it, thought it was ace, and then Shark contacted him, paid him alot of money for it and asked him to take his videos of it off youtube!
You could always just import a US vac, then buy a 110v site transformer to run it