Occasionally, we receive questions about where or how to get replacement parts for QanBa joystick. These parts include motherboards, USB cables, headphone jacks, compartment doors and so forth. I'm afraid that we do not carry repair or replacement parts for QanBa hardware, but we can refer you to Qanba's facebook page or official Shoryuken.com forum thread, where you can ask for a replacement part.
Official Shoryuken.com forum: Click here
Main QanBa contact on Shoryuken.com forum: Click here
Official Facebook page: https://www.facebook.com/QanBa