Hi Craig,
You can buy that part from Hobby Serivces (217-398-0007) it is part number HSP50140. You would also need to have the stick pots checked for calibration after you make the change. This though should be done here at the service center.
I hope you find this information helpful. You can also reach our Futaba support technical team at 217-398-8970, or via fax at 217-398-7721.
Sincerely,
Krysta
Lead Futaba Customer Service and Programming Technician
Also you may want to check our Website at (
http://www.futaba-rc.com)