KORG X3 KEY CONTACT STRIP
6 April 2009:
The Korg X3 rubber contact strip is discontinued but there's a Yamaha part that fits.
The latest Yamaha part number is #VF83410R.
Besides fitting the Korg X3, the Yamaha contact strip seems to fit at least the following Yamaha keyboards:
You can call Yamaha parts at 888-892-6242 and order the contact strip. It isn't stocked in the United States and will take 4-6 weeks, from when you order it, to arrive. Today's price is $45.26 plus $4.95 for mailing.