I look for these singles :

Yousei yori Ai wo Komete 3 : http://www.usagi.org/doi/seiyuu/cd/blue-seed/yousei3.html

Yousei yori Ai wo Komete 4 : http://www.hatanaka-setubi.com/doi/seiyuu/cd/blue-seed/yousei4.html

Yousei yori Ai wo Komete 5 : http://www.usagi.org/doi/seiyuu/cd/blue-seed/yousei5.html

Thanks for the help

you can download them from here: http://www.xiami.com/search?key=%E5%A6%96%E7%B2%BE%E3%82%88%E3%82%8A%E6 %84%9B%E3%82%92%E3%81%93%E3%82%81%E3%81%A6&pos=1

thank you