Greetings! I'm looking for GameCube Memory cards, new or second hand, original or third party, AS LONG AS THEY FIT INTO THE GC GAME BOXES (i.e. in the slot in the cases of the games)

I'm in England, so am looking for PAL memory cards; and as I am looking for 10+ cards would prefer to buy them in packs of 5+ to save on shipping!

Thanks,
Michele