Cayman - roof bars options?

[mft]

Just wondered whether anyone else has been through sorting out the options for fitting roof bars to a Cayman? Obviously, there's the Porsche option, but I was also wondering about Thule, who offer a range of individual 'feet' (http://www.thule.com/en/GB/Products/Base-Racks/Feet) to pair with their bars.

This thread (http://www.911uk.com/viewtopic.php?t=74567) talks about the compatibility of the Thule roof attachments with 996s and 997s; does anyone know whether the Cayman and 911 roof attachments are identical?