How to play mp3's but prevent downloading

I need a plug-in that will allow me to link to a copyrighted MP3 file that is playable on the blog. It would disallow illegal downloading of the MP3 file, but would give a link whereby the visitor could go to purchase the song or album.

A plus would be to also get an image of the album or singer to install next to the linked file on the blog.

Any help or advice appreciated. ??