It seems that Fila is starting to grow their official collection of Davis Cup themed tennis shirts. Now you can purchase your Australian Davis Cup themed shirt from Tennis Warehouse.
Above left to right are Australia (which has not been played in yet), Croatia (made to look like a soccer shirt for huge fan Marin Cilic), Israel for Andy Ram and Jonathan Erlich, and Serbia (originally made for Janko Tipsarevic in 2010). Each runs $59 USD. No word on what country is next.
Find them exclusively at Tennis Warehouse.