Well there are some EU sites that sell RL stuff but it's expensive and not worth ordering from these sites. Neiman Marcus and Saks sells RL black label. Your best bet would be finding a US proxy service like this one;
http://www.styleforum.net/showthread.php?t=181105
Or check around
http://www.superfuture.com/supertalk/.
What are you looking to buy anyways?