Type the following into the google search bar and it will give you indexes of music files you can download. You'll have to replace the word BAND with the name of the artist or band you're searching for.

heres what you type into the google search bar:
{-inurl:(htm|html|php) intitle:"index of" +"last modified" +"parent directory" +description +size +(wma|mp3) "BAND"}

i don't browse the IGT forums often enough to know if this has been posted already, so if it has then my apologies.