Er.....Not quite sure what you have spent your money on, because it doesnt cost me a thing..
Have opened an account at fileden.com?
If not, thats the free, easy cheap way of doing it.
If you need help, i'll keep you straight?
Once you have saved your mp3 file to your file den account, you simply put a link to the file location or 'url' to the fileden account in your profile information page and voila....
Matty