As far as I know, the cards from different countries cannot be used. I.E. UK card does not work for US, Aus doesn't work in Germany, etc. (Example on site was Australia and Germany) Might disrupt your idea a tad :/.
He can buy the card online for the country the winner is in. Steve is so nice! Colt you shall not win, because I'm going to win >.> you owe me songs on my wall by the way ._.