Thanks for the replies so far, however...
ebay - only ones on UK ebay are from the USA and p&p alone is £17!
LA Pump - is in USA and alas like many US sites they dont mention international shipping.
this is why I asked for UK suppliers
There are some UK suppliers out there that I have found so far, but they want £35+ just for one small clit cyclinder which is a total rip off.