You can find sheet music and recordings on Swahili Music Notes, which is the primary digital library for Tanzanian choir compositions. Search specifically for to find his original arrangements.

(To all who call upon Him in truth/faithfulness.) Verses (Themes):

Usually written in a steady 2/4 or 4/4 time signature with a moderate, processional tempo. Vocals: Sopranos/Altos: Keep the melody bright and clear. Tenors/Basses: Provide a strong, rhythmic foundation.

Focuses on God's presence and readiness to hear those who seek Him with a sincere heart.

Often accompanied by a keyboard (organ style) or rhythmic percussion (drums/shakers) characteristic of the Iringa region's liturgical style.

Nota za Bwana yu karibu na Jose C. Kabaya - Swahili Music Notes

The song typically follows a "Call and Response" structure common in Tanzanian choral music.