Contact Werner Customer Service as the next step.
Werner won't sell you any paddle directly; you have to order it from one of their dealers. Unfortunately, most of their dealers aren't aware what type of 4-piece paddles the factory will custom build. So, get the part number from Werner CS and then give that information to your dealer so they can order you the paddle. It typically only takes 5 business days for Werner to make up a custom paddle.
The last time I ordered a custom 4-piece Werner paddle was 5/7/13. On that date, Shanna in CS said, "1 1/2 months ago we started offering longer 4-piece WW paddle lengths do to the large number of requests from packrafters. She said the company was aware that most packrafters were previously using Werner touring paddles in order to find the longer lengths optimal for a pack raft. She also said that although the touring blades normally hold-up, in class III and above, touring shafts are liable to break.