David, there was a set on ebay here about a week before you posted last time. I haven't seen one since then. Are you watching US and Canadian ebay too? If I come across a set at a sale or online I'll be sure to let you know.
Try going to vac repair shops, some places have a load of old tools lying about that they might let you have, either for free or for a small price, you just have to look around...