Can't find a source for the sheet music but here are the lyrics
https://www.youtube.com/watch?v=LBCuageJOvs
Here Am I
So many lost and dying in this world today
Have you heard their crying or do you turn away
The harvest now is plenteous but the laborers are few
God needs some willing vessels to be used
Chorus
Here am I. I will go
I will reach the lost untold
I will give the Lord control
I will tell them of the Crimson Flow
Is it too late for caring, does Jesus really say
Are we truly praying for the blind to find their way
Little children are falling into a burning hell
Will anyone hear the calling to go and tell
Chorus
For my Savior died on that Old Rugged Cross
He thought of me when He counted the cost
How can I say that I love Him if I don't reply