I saw these but I'm hesitant to buy them because I have no idea if I can actually change them out or not:
http://cgi.ebay.com/ebaymotors/Side-Tension-Cables-26-1-8-Long-Porsche-Boxster-01-02_W0QQitemZ270501756495QQcmdZViewItemQQptZMotors_ Car_Truck_Parts_Accessories?hash=item3efb293e4f#ht _3446wt_1167
Has anyone done this repair?
Mine are stretched out due to the first owner having a hard top on the car for three straight years. Every time the top is raised I have to manually tuck the sides into the channel. The elastic is also all stretched out, which would have to be replaced too, but that's another issue altogether.