Best Place to get good HS & Fan?

[Wildfire]

What's the best place to get a good Heat Sink and Fan on the net?
I'm in England so preferably in £'s and somewhere reliable. I want a good value for money unit. I have a Global Win FOP 38 at the mo.

Any reccomendations would be great.

850 Mhz TBird @ 1000
Abit KT7A
1.85 Core Voltage
512Mb PQI PC 133
GeForce 2 MX DH Pro
Soundblaster Live