How to buy Japanese Music

I lived in Japan for two years, 1975-77, and enjoyed a particular group - Akai Tori - and had one of their albums, on a cassette tape that has since died. Is there any way to get a digital download of this group. The attached link is the particular album I am interested in.

赤い鳥の「GOLDEN☆BEST / 赤い鳥 翼をください~竹田の子守唄」

I would greatly appreciate any help.

Thanks, Trey