I find High quality (FLAC) soundtrack below

1) Power Instinct 2 (gouketsuji ichizoku 2)
2) Gouketsuji Ichizoku Chotto Dake Saikyou Densetsu (豪血寺一族ほんの少しだけ最強伝説（PS1）)
3) Gouketsuji Ichizoku Saikyou Densetsu (豪血寺一族最強伝説)

Afraid to trouble, thank you earnestly.