Is there an OST (original sound track) for The Melancholy of Haruhi Suzumiya that has all the episodes' music?

I've already downloaded this bunch of MP3s sung by the Japanese cast which are great and all and include the fab song from episode 0 and of course the theme tune (about six copies of it =/ ) but I'm looking for the excellent music you hear played in the background of each episode; does anyone know if a disc was released of these tracks? If I can be sure of what is on it (I can't read Japanese) I'll be more inclined to buy it this time rather than pirate more music, honest. Many thanks.