Quicktag to add MP3 icon to mp3 download links?

I’m trying to figure out an easy way to add an icon just to the left of any mp3 downloads on my site. If there was a way that other authors could do this automatically using a quicktag, even better!

The likes of http://www.1pixelout.net/code/audio-player-wordpress-plugin/ inserts a full flash mp3 player – I juas want to add a wee icon – any ideas on how to go about this? Can I hijack the enclosure gubbins somehow?

Thanks for your time,

3stripe