Since my own Googling of this sort of resource came up with nothing, I am posting this in the hopes it will be helpful to others. This is the litany from the unveiling of our new electronic sign at First Presbyterian Church of Holt:
Sign Unveiling Litany
Leader: Through covenantal rainbow and burning bush.
People: We see signs that God is with us.
Leader: Through pillar of cloud and manna in the wilderness.
People: We see signs that God is with us.
Leader: Through baptismal waters and communion feast.
People: We see signs that God is with us.
Leader: Through holy word and the light of Christ.
People: We see signs that God is with us.
Leader: In the community of Holt and the ministries of our church.
People: We see signs that God is with us.
Leader: May this new sign serve as a light to all who pass, letting them know that God is with us.