I am engaged in an exercise to plug the gaps, looking for songs published after As One Voice. For OCP songs, I am using selections from Never Too Young, a collection designed for the youth.
This is song from 2005 by Mark Friedman and Janet Vogt. So far all the songs I’ve looked at are fine for adults as well and not in any way made easy for the kids. This one, for example, has a ferocious range, so despite being a lively gathering song it is probably best for a choir.
An MP3 can be purchased at OCP but it is not available as a downloadable piece of sheet music there. Some approximate lyrics are here. Listen to their recording to get them accurately.