Your question makes me miss my UK relatives. They love to come over and shop till they drop. Having said that , here is a link to the Florida Keys Outlet Center. They are owned by Premium Outlets, which has many outlet malls throughout the U.S. They have both high end and moderately priced stores. This one doesn't look quite as big as the one near me, but it is a start
http://www.premiumoutlets.com/outlets/outlet.asp?id=93. There is also the Sawgrass Mills Outlet in Sunrise, Florida http://www.simon.com/mall/?id=1262