where can I get a high speed 70mm fan?

[hardass]

I want at least 6000 rpm, for my coolermaster heatsink.thanx

 

[CheapGator]

70mm is kinda rare. There's 1 at nexfan. I'm wondering what kinda cfm you're getting with your fan since rpm really doesn't matter if it isn't moving the air well. Just a thought, but I'll keep my eyes open just the same.