Sorry, no intent to confuse! Just go and buy either 1 x 2000W step-down from ebay from the link polyglot gave. It will be good enough. Alternatively you could buy 2 x 1000W units. These will be just powerful enough for the job. If you are feeling slightly richer and want a little more security get 1 x 3000W or 2 x 1500W. These will run with slightly less stress. Honestly, they WILL work. You don't need to spend extra by going to a shop.
Ignore the comments about magic smoke. Its a secret known only to those who tinker with things electrical.