(Reuters) - Australian winemakers are setting up replica cellar doors in China and running wine clubs and tastings as they intensify efforts to win Chinese buyers in a bid to offset shrinking demand in their traditional British and U.S. markets. The wealthy Chinese consumer, with a growing appetite for luxury brands, is the main target for premium winemakers such as Penfolds, which next month will launch a new wine, Special Bin 620, in Shanghai.