You can get the Drama album much easier on Record. The CD is impossible to find. As the record is in Japanese there is little benefit for me to buy it as i only understand English sans subtitles. When i can just enjoy the soundtrack instead without the dialog or sound effects. Not the only anime film for there to be an audio drama version or complete dialog and effects on a vinyl record or CD. Some of the Space Battleship Yamato films got that treatment. Even the English version Space Cruiser Yamato is available on Vinyl if not the complete film.
All of the Nausicaa Vinyl releases were reissued except for the drama album. But you can still buy it from Japan if you really want the expense.
I just found that the Mono Mix for Bullitt is available on a Japanese Laserdisc, and Dirty Harry is available on a first issue US disc in Mono. So all i need to do is buy those for my collection. Found out a Fistful of Dollars was released in 2018 on Blu Ray with the mono audio i wanted for a long time. So at least i don’t have to get the Laserdisc for that.