http://www.playonloop.com/2013-music-loops/smart-ideas/
http://freesound.org/people/simondsouza/sounds/187099/
http://freesound.org/people/Th3R3m1x3d/sounds/106552/
http://freesound.org/people/thirsk/sounds/121077/
http://freesound.org/people/bunkum%20b/sounds/9180/
http://freesound.org/people/GR3AVE5Y/sounds/149395/