Act fast and check out this short list of open MP3 indexes, courtesy of Totally Fuzzy. One of them even includes the studio version of a certain song (MP3, 8.18 MB) that I've been playing a lot, recently.
Addendum 25 May 2005: Um, OK, the proprietor of the 'dex containing "Cowgirl" is just a teensy bit annoyed with my direct link (click it above, and you'll see), but curiously has still left the music index page itself open (at least for now). So, you always click through there, and scroll down to download. Or not.