If you live in Sydney, go down to Market City's Games Infinity. They sell heaps of merchandise and hentai there. I bought my FFX leather wallet from there. They also sell Tidus' necklace, Paine's necklace and the Griever one in sterling silver and plain dull stainless steel. It's a huge rip off either way. ('bout a hundred something for the silver one, that's Aussie dollars btw)

Ebay it.