Thanks for the replies....and mswscco, thanks for offering up your set (so generous of you, but would never take up your offer!)
I went to Pep Boys in Lake Forest and found some cables for that size. $100 for the pair.
I went up north last Saturday and when I got to the entrance of the Sequoia National Forest, the trooper just released the chains requirement - woohoo! The vehicle did very well and felt very stable on the icy roads leading up to Hume Lake. I had to take a different car down ('05 Passat) and was wishing I had my Sequoia with me! oh well the rest of my family will be safe coming down the hill this weekend!