Needs to be compatible with the CC-by 4.0 license of the TO media obviously.
I'll start:
Much from here fits: http://soundimage.org/sci-fi/ (but I would go for faster tracks, maybe those from the "techno" section)
Selected tracks:
http://soundimage.org/wp-content/upload ... Mayhem.mp3
http://soundimage.org/wp-content/upload ... Mayhem.mp3
http://soundimage.org/wp-content/upload ... i-Open.mp3
http://soundimage.org/wp-content/upload ... c_Rain.mp3
http://soundimage.org/wp-content/upload ... meplay.mp3