Graham, what exactley are you after? If you mean flint sticks as mentioned above, then go to any decent army surplus store and they should be able to get hold of them for you. Alternatively do a search of UK websites for survival equipment? Or try http://www.edirectory.co.uk/penrithsurvival/index.htm (sorry, don't know how to make it clickable, and to be truthful don't care!)
HTH
Si