So far I found nothing but dead links and an incomplete youtube playlist. Looking for stream / torrent / ddl / anything as long as I get to hear the full album (34 tracks).

English title is: "Origin: Spirits Of The Past Soundtrack"
Original movie title is "銀色の髪のアギト" (Gin'iro no Kami no Agito)
Composer is Iwasaki Taku.
Date is 2006.
Also here's a sample from the yt playlist: https://www.youtube.com/watch?v=Ok_PinV2cas&list=PL8qajyFGPqnhmB6no7q7v9F2HR59y-Rca&index=5&pp=iAQB8AUB