You can just replace the switch. there is a write up on the site.
I just did mine today.
1 - Disconnect the battery wait 10 to 15 mins.
2 - Pry out two plugs covering driver side air bag module screws on sides of steering wheel.
3.Remove two driver side air bag module retaining screws on side of steering wheel from driver side air bag module, and lift module away from steering wheel.
4 - The air bag should be loose now, and you can lift it out, just rest it up on top of the steering column. No need to disconnect the wires.
5 - with a Phillips screwdriver, remove the switches
6 - disconnect the wiring from the switches - the ribbon/clip will pull away from the cruise buttons, don't be afraid, just use a pair of needle nose pliers to gently pull the ribbon/clip off the buttons. be careful not to pull the ribbon, pull on the connector
7 - put in the new buttons - just push the ribbon/clip wiring on
8 - screw them back in place
9 - put the air bag back in and secure with the small screws on each side
10 - replace the plastic covers over the holes on each side of the wheel.