Google Play offers downloads of ZZ Top's Sharped Dressed Man MP3 Single for free. (Scroll down to find it.) That's the best deal we could find for this track. (iTunes charges 69 cents and Amazon charges 99 cents.)
Note that you will need an Xbox LIVE Gold membership in order to stream music from an Xbox. You'll also need to cancel the Music Pass membership before the trial is over to avoid a recurring monthly fee.