Ever heard of Google?
If you type "myson electric towel rail" into Google, in 0.0000000000006 seconds you get a link to the makers at http://www.myson.co.uk/faq_towel_warmers.asp
on the home page there is a nice handy link called "Ask Myson".
Why dont you do the obvious?
Good grief, I'm going back down the pub...........
ttc, did more that you, found out they are made by a german firm called JEKA, myson not interested in supplying parts, i have e-mailed germany but still waiting for reply just thought someone might have found a stockist or bought one. not you tho obviously.