The Battle of Red Cliffs and its expansions are now available to purchase on Game Salute web site. http://shop.gamesalute.com/products/the-battle-of-red-cliffs
Command 1 Expansion
Command 2 Expansion
I believe they will be soon available on Amazon too.
Just in case you are wondering, you can also purchase Mines of the Sacred Dragon at Game Salute http://shop.gamesalute.com/products/mines-of-the-sacred-dragon
For europe, The Battle of Red Cliffs will arrive after Essen 2013. In the meantime, you may purchase Di Renjie, Soccer Sonic and Mines of the Sacred Dragon from Spiel Material in Germany http://www.spielematerial.de/en/mucke-games/sunrise-tornado-game-studio.html.
Thank you for your support and have a great weekend!