Hi,
I've recently moved to London in the UK and brought along my trusty cooker. It states that it requires 120V @60/1235 watts. After some research on the net it was apparant that transformers that provide > 1000W are at least the size of a shoebox and around $70-100. However, I later came across a transformer sold by jWin which rates upto 1600W and is as small as an average 100w transformer and costs about $10. You can see it here -
James