Try looking at some of the music from the 80's. Things like theme tunes from TV and films that are primarily electronic. Things I can think of off the top of my head are:
Miami Vice Theme
Airwolf Theme
Pretty much anything by ELO
Some Jean Michel Jarre might not go amiss either
But that's just my choice. As to where you can get them, your local music shop should stock the CDs which you can then rip to MP3