Absolute Anime

Ok. If possible, i'd like to be helped in this one.
There's this song called Mustang of the band Asian Kung Fu Generation I heard when I was going to Japan. I heard this song at the plane, and I really like it. I'd like to put this song in my ipod, but I can't find the song anywhere! >____<
It reminds me of Japan, so its very special to me!
Please, help!

I can check to see if I have it when I get home. I have lots and lots of anime/jpop/jrock that I inherited from people, so I don't even know what I've got.