The soundtrack of Seven Samurai you might be looking for is this one: AKIRA KUROSAWA - AK-0001 (
http://www.godzillamonstermusic.com/ak0001.htm)
The soundtrack is included on the first part of three of a collection of Kurosawa movie soundtracks, containing a total of 18 discs. I don't have it but i will take a look for it.
However you can find more Seven Samurai music on these albums too:
- The Film Music Of Akira Kurosawa (1 CD) (
http://forums.ffshrine.org/f92/big-orchestral-action-music-thread-57893/59.html#post1216387)
- Film Music of Akira Kurosawa (5 CD's) (
http://forums.ffshrine.org/f92/big-orchestral-action-music-thread-57893/58.html#post1216066)
On the other hand, if you are interested not only on Seven Samurai but also on other Fumio Hayasaka music, i recommend you to take a look and listen to this excellent recording of his music:
- The Seven Samurais - The Artistry of Fumio Hayasaka (
http://forums.ffshrine.org/f92/big-orchestral-action-music-thread-57893/226.html#post1497390)