Give Wemoto a ring first, but insist on that part number only. They deliver very quickly.
http://www.wemoto.com/bikes/yamaha/fzs_6..._sp/02-03/
If not, Fowlers of Bristol will definitely have them. They'll ask you for your chassis number though, on your frame at the right side of the tank i think?
http://www.fowlersonlineshop.co.uk/help/contactus.aspx
More people are born because of alcohol than will ever die from it.