After having trouble finding these, I created my own Cpanel PSDs for Cpanel branding..
Starting with x2’s main menu, others will follow. If you have any questions, or requests, email me at chris at christaggart dot com or drop some comments below. 
x2
Cheers,
The Tipping Point : How Little Things Can Make a Big Difference by Malcolm Gladwell
Wikinomics: How Mass Collaboration Changes Everything by Anthony D. Williams
Blue Ocean Strategy by W. Chan Kim
The Long Tail by Chris Anderson