Found this website the other day- amaethyst crafts . With the 20% discount advertised on the home page it brings the large dies to £8, and the other dies are cheaper than I've seen anywhere as well. They also offer free delivery if you are willing to wait 5 days. Yorkie has had hers today (we both ordered last week) and mine have come but I wasn't home to get it- typical).
Have spoken to them on the phone and they're just starting with the sizzix so haven't got the sizzlets yet but if they find that it is a success then they are going to expand