A year or so ago I Google searched looking for people selling it.
I found someone on Craigslist in the States, who I bought it from for $70. Luckily it arrived, because it was quite a risk, especially considering the price was well below what people were trying to get for it.
It seems that it's just gotten even harder to find, but just be persistent, and know that you'll be shelling out a lot of money for a great (and very rare) game.