I really don't know if the guys from that store deliver to south america, I think that Ebay is your best bet.
Haven't you got either a "Ciudad manga", "Mangalandia", "todomanga", (somehting like that
) in your city? I know there's a somewhat famous store in Buenos Aires that goes in a name similar to those I mentioned, but I really forgot, it's been long since the last time I saw the advertisement (in the "Magic" channel, I believe )
Well, anyways, what I have said, does it ring any bells?