The Metzelers I referred to are not the current models, which I have not tried. It was several years ago when I had a pair and they were like riding on ice on some surfaces, even in the dry. Having discovered Avon Venoms I haven't tried any later versions of any other brand!

Try finding an Avon dealer here:

http://www.avon-tyres.co.uk/motorcycle/?page=dealers

Best of luck!