They are genuine, and they're stuff is pretty good quality. Both @240 and I are running their camber/toe arms on our c30s.
You used to have to email them for a quote to send to Aus, so at some point they must have received a letter from customs and misunderstood/got scared of sending stuff.
I think they only have to register to collect gst if they sell over $75,000 worth of stuff per annum.
Maybe suggest they list them on eBay then eBay will collect the gay for them