With a few week’s to go to Good Friday, here is an option for that liturgy from Never Too Young. By Paule Freeburg and Christopher Walker, it is a mantra suitable for all ages.
If you look at the sample at OCP, apart from the text, they have several instrumental interludes. You can purchase the octavo on line (min 5) there.
I used two of the instrumental interludes for my BIAB backing.