Just found some Dtb2 soundtracks on Youtube & NicoNico...
猛犬ケルベロス
"Vicious Dog Cerberus"
(ep.3 when Hei, Mao & Suou are trying to escape from Russain army)
笑う金剛童子
"Laughing Vajra-Kumara"
(ep.5 when Hei is fighting the water-using contractor)
稲妻フラッシュ短歌
"Lightning Flash Tanka (Short Song)"
(ep.1 when Hei is fighting the hamburger-eating contractor)
迦楼羅炎
"Karuraen"
ギャラクシー・トレイン
"Galaxy Train"
(ep.9 when Hei kidnaps Youko)
No.23
(ep.8 Wwhen Tania is chasing Suou)
http://www.nicovideo.jp/watch/nm9207211
Dive into the 9
http://www.nicovideo.jp/watch/nm9207137