Most bikes are available in 25"/64cm size, which is about what I ride (I'm 6-foot-4). Some older bikes were available in 27" frames- search the Classic & Vintage forum if you're interested. As Bob says, they're not common. Here's a picture of one: http://www.unc.edu/~cupery/pics/bikes/Schwinn_commuter/

If you get into riding, and scrape up the money, custom will get you anything. One of my friends is 6-foot-8 and rides a custom Bacchetta recumbent (they're in Florida, too). Then there's really custom: http://bikeportland.org/2011/07/11/b...e-region-56078