Amazon.com: BOSS OC-3 Electronic Keyboard Pedal or Footswitch (OC3) : Musical Instruments
Boss OC-5 Polyphonic Guitar/Bass Octave Pedal | Sweetwater
Amazon.com: Koogo Guitar Octave Digital Pedal Octpus Pedals for Electric Guitar Precise Polyphonic Octave Effect Generator Pedals With No Distorted Sound : Musical Instruments
Guitar Pedal X - GPX Blog - Danelectro Releases 3 more pedals for its Relic'd Vintage range including the 3699 Octave Fuzz, Roebuck Distortion and Back Talk Reverse Delay
Guitar Octave & Pitch Shift Pedals - Your Ultimate Guide from Andertons Music Co.
Boss OC-5 Polyphonic Guitar/Bass Octave Pedal | Sweetwater