Amazon.com: BOSS EV-5 Expression Guitar Pedal and M-Audio SP-2 - Universal Sustain Pedal with Piano Style Action For MIDI Keyboards, Digital Pianos & More : Everything Else
Amazon.com: AKAI Professional Expression Pedal – Lightweight, Robust, Non Slip Pedal for MIDI Keyboard Controllers, Guitar Supported Effects, with 1.8m Cable : Musical Instruments