Sounds interesting.
I have not had anything to do with Choirs in the past
But... have just stared writing for Brass Band and SATB Choir

See
This Score
Every Child does matter.. I have been involved with
Trash Arts and the
Scottish National Funneloniums both of which aim to help get all children from all walks of life into music making in a all inclusive not exclusive way.
Self Esteem is important for all children.
Let me know exactly what you want/bespoke and I will see what I can do to help by way of original pdf's.
at the very least I can advertise your cause on the FMFK Website.