Try Revzilla. They show them available in 2-3 weeks. 92077-0015 - $3.03 Or Knob kit 99999-0154 - $12.09
This shows all the bits & pieces.
https://www.revzilla.com/oem/kawasaki/2008-kawasaki-concours-14-abs-zg1400/headlights?submodel=concours-14-abs-zg1400a8f