Here is an analysis regarding the track and its digital availability: "Sierra Leone - Mariama" Track Details Lorne Balfe (often listed alongside Hans Zimmer).
Other Sierra Leonean music, including artists like Emmerson , Alonzo, and DJ Lulu, can be found for purchase on ReverbNation. Other Potential Interpretations Sierra Leone Mariama MP3 Download
If it is the Lorne Balfe track, I can try to help you find an official place to buy it. Here is an analysis regarding the track and
Found on the soundtrack album Saints & Strangers (Music from the Miniseries) , released in 2015. Genre/Style: Dramatic/Soundtrack. Technical Specs: Often listed as 6:16 duration, 320kb/s. Digital Presence and MP3 Access including artists like Emmerson
The track is available on music streaming platforms that offer MP3 downloads (e.g., Hitmo.net).