Amazon.com: Sustain Pedal for Keyboard - Sovvid Piano Foot Pedal with Polarity Switch for All Brands Electronic Keyboards, MIDI Keyboards, Digital Pianos, Yamaha, Casio, Roland, Korg, Behringer, Moog and More : Musical
The Best Sustain Pedals for Keyboards and Digital and Electric Pianos – Rolling Stone
Sustain Pedal Polarity Switch for MIDI Keyboard Digital Piano Yamaha Casio Black 764494982203 | eBay
Sustain Pedal Polarity Switch for MIDI Keyboard Digital Piano Yamaha Casio Black 764494982203 | eBay
Piano/Keyboard Sustain Damper Pedal w/Polarity Switch For Yamaha Casio Roland | eBay
If Your Sustain Is Pedal Working In Reverse, This May Be Why – Piano From Scratch
What type of keyboard sustain pedal should I buy? Why is my keyboard pedal not working/backwards? - YouTube
switches - Fixing the wiring on a keyboard sustain pedal - Electrical Engineering Stack Exchange