You own the boat; you should be able to get the new rudder--free. If your dealer won't supply it to you or get Hobie to send it to you, contact Hobie directly. You can register your boat on line at the Hobie site http://www.hobiecat.com/product-registration/
. You will need the s/n number on the starboard side of the stern. As fusioneng says, the new vertical rudder came out in 2011 and registered users received the new rudder free.
Personally, I think the new, vertical rudder is a huge improvement over the "Rube Goldberg" Twist-n-Stow rudder. The vertical rudder is significantly larger than the old T-n-S, at least it was on my 2011 AI. Rick Parks and I measured the difference in size on a camping trip to Tiger Key--you can read about it here and see the difference in the trip report on this page http://www.hobiecat.com/forums/viewtopic.php?f=70&t=7276&start=180
Regarding breaking the rudder shear pin, I don't see any difference between the new and the old. If you come ashore, without releasing the rudder so it can kick up, the shear pin will break--new vertical rudder or old T-n-S. I love the new (2011) vertical rudder. For me, it was a blessing (sent from Hobie.)