That's typical of online streaming/download services like iTunes though - licensing of music might differ between regions so they restrict purchases for it being made in areas they have not yet licensed the content too (I presume for some reason, FF OSTs and albums are not licensed for sale in Australia). My advice would be to forget trying to get the OSTs there and go for the physical Bluray/CD OST albums, which you can buy online from either SE's own store or a third party store (this one is where I get my soundtracks from for example).