Visiting New Zealand in 2008 I came across green-lipped mussels for the very first time in Wellington. An instant hit! Land-locked in southern NSW I was pleased to find that I could get them here as well.
For best results I find that Cascade Premium Lite is my preference for this meal. Alternatively Grolsch or Stella Artois work equally well. You can use frozen mussels (especially if living in rural Australia) but fresh mussels give the best results.