O Sifuni Mungu – 2 choirs and percussion a cappella

Friends, by any chance, does somebody know where can I find this specific arrangement (2 choirs and percussion a cappella)? I sang it a looooooooong time ago, lost my score, and I would like to do it with my vocal group again, but only find on internet for SATB or SSAA or TTBB or 2 parts with piano…

 

Any help, please?

 

Thank you! 

 

P.S.: I’m trying to buy it, but only found on the website the section for borrowing. 🙂