I stripped mine. looking specifically for the new top cap for the Evo.
This one:
http://www.cannondaleexperts.com/Cannondale-Evo-SI-Expanding-Compression-WedgeTop-Cap-for-Carbon-Steerer-Tubes--KP017_p_106.html
This one:
http://www.cannondaleexperts.com/Cannondale-Evo-SI-Expanding-Compression-WedgeTop-Cap-for-Carbon-Steerer-Tubes--KP017_p_106.html