ordered a set a week ago from spareshack for £195 +postage, and they were delivered the next day. I havn't fitted them yet, but I had a set for my 888 and they made a huge difference.
Spareshack were the only, therefore cheapest place in the UK that do them that i found when i was considering Cyclecat vs Helibars.
The other option is just order them from the States direct.
The cycle cat bars do look very trick (moreso than helibars) but i went for the helibars because i knew the position worked well for my knackered wrist. Ordered them from the States, here within a couple of days and i think about £160, inc postage and duty etc.
got mine from here, at current rates bout 130 plus tax, but spareshack seem to have brought their prices down in 195 plu p&p now (as long as thats the riser ones) so not much of a saving now