Google gives 6,010 hits on "Sarah Morgan." It's a common name.

I've identified one who is a songwriter, a member of Hen Party and Mike and Sarah (w/ Mike O'Connor), also "Fieldwork," and formerly "Bread and Roses."

The Hen Party site gives Sarah's email address and her phone number, so I suppose you could ask her for the lyrics.

But wait! There is another Sarah Morgan who is a member of The Curate's Egg, and another who is a member of Bound by Nothing

Are we in the right ball park yet?