I found four tracks without wocals ,on Polish "Wrzuta" website ,there are:
Master Passion Greed ,Bye Bye Beautyful and Cadence Of Her Last Breach.
And of course Amaranth.
*snip*
I'm currently unable to check them ,but they are descrited as without wocals (bez wokalu).
Disregard the last one on the page ,it's a Ghost Love Score ,which looks like a normal version.
You can download files from Wrzuta here: *snap*
Just copy/paste the link from the adress bar into text box ,click red button with "Pobierz" (download) on it and then just click the dark red word "pobierz" under the song title (you can also use "save target element as" ,opera sometimes wanted to play the file instead of dowloading it).
I apologize for linking you to Polish sites ,but that's everything I can do.
I don't know any english equivalent of this site. (maybe YouTube ,but I found Wrzuta far more handy when it comes to downloading the files).
No links to copyrighted stuff, plzkthxbai.