Anyone know where you can buy something like this?

[n00b]

I'm referring to the spring-loaded holdown mechanism.

http://www.overclockers.com/articles165/beeh1.jpg

[mfpmax]

Just make one, they aren't that hard to do.

[JLeufkens]

Does it have to be spring activated? Heres a link of one, scroll dowon, its on the right. http://www.leufkentechnologies.com/page10.html

[Kevin]

Here's one, but I have never tried this clip personally. http://highvoltagepc.safeshopper.com/75/cat75.htm?447
Tell him that Kevin from ProCooling sent you cuz I know him.
-Kev