I have been importing all my Bits from Central Florida Motorsport (CFM) in the states so my Clutch, Fly, Short shifter, Bushes, Underdrive Pulleys and Cam pulley all came from there.
In hindsight i would save up and order all the bits at once as i got stung for Import tax with every order, BUT it was still cheaper than Puma Speed. Puma Speed stock all the CFM gear but a massively inflated prices. You can get a Vernier Cam pulley from Piper i belive but they are around £100-110
I liked the CFM one because it had the most locking screws, the CFM one works out at £75