Wanted Looking for Hiroshi Inagaki Screenplays (Translated into English, if possible) For Academic Study.

Hello, I am Looking for Hiroshi Inagaki Screenplays (Translated into English, if possible) For Academic Study in a classroom setting. To teach Samaurai storylines. The Hiroshi Inagaki trioloy from the 1960s is what I am specifically searching for. Even if, in Japanese. Thank you.

Do you mean "Miyamoto Musashi Trioloy (Samurai Trioloy)" by "the Hiroshi Inagaki trioloy", right? I can only find the following book written by 若尾徳平 Wakao Tokuhei who was the co-writer of the screenplays. This book seems to contain the screenplay of the first film of the Samurai Trilogy 宮本武蔵 Samurai I: Musashi Miyamoto. You would be able to only get a secondhand one even for this book, though.

若尾徳平シナリオ集 Wakao Tokuhei Screenplay Anthology
Amazon product ASIN

EDIT:
I found the screenplay of the second film 続宮本武蔵 一乗寺の決斗 Samurai II: Duel at Ichijoji Temple. This is a really-used screenplay book, so it's a bit expensive, though.