I had about as much luck when trying to find Galaxy hops. Our pals from down under must be using them all. Not that I blame them. Good stuff.
I did go to a German-style brewpub in Australia (I think it was in Canberra) that used Nelson Sauvin in a blend of three hops, the result being something that I swore were proper German noble hops. I didn't write down the combination because I couldn't get the hops, but I was just amazed at what the people down there were doing. I just loved that they were willing to try ideas like that (hop substitution) based on what they had available. They're not short on creativity or talent.
We do see some NZ hops, so I'm hoping the situation will change.
CraftBrewer in Australia will sell them. Rebel Brewer in the states seems to get them occasionally.