There’s a link to where you can buy the album at the very top of the page
Update: Now there is.
https://deadrobotz.bandcamp.com/album/putrescence-regnant-collab-with-m-rk-borg
Update: Now there is.
https://deadrobotz.bandcamp.com/album/putrescence-regnant-collab-with-m-rk-borg