HP-210 Stereo Headphones:
1x https://www.gear4music.com/us/en/PA-DJ-and-Lighting/HP-210-Stereo-Headphones-by-Gear4music/8ZJ
5x https://www.gear4music.com/us/en/Recording-and-Computers/HP-210-Stereo-Headphones-by-Gear4music-Pack-of-5/23K4

3.5mm Extension Cable:
http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575319243&toolid=10001&campid=5338160776&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fitm%2F10ft-3-5mm-1-8-Stereo-Audio-Aux-Headphone-Cable-Extension-Cord-Male-to-Female-x%2F272099376120%3FssPageName%3DSTRK%253AMEBIDX%253AIT%26_trksid%3Dp2057872.m2749.l2649