It's called 'Miami Vice' by Jan Hammer - it was a hit single at the time of the series, so usual outlets will supply - a 'T.V. Themes' or '80's' compliation will probably include this.
I've got it on 7 inch, the best version is the TV Version only 45 seconds long. Jan Hammer also did an album called 'Escape From Television' with it and 'Crockett's Theme' on.