My primary resource for this task was Allmusic.com. It's a searchable database of music, where you can find what appears to be any song ever recorded (recently, anyway). Here it is:

Cast: (by George Elliot)
Lost Boys - The Blood Brothers
Little Boy Lost - Jimmy Dean
Lost Boy: Unrelenting - Old Dead Tree
Jesus the Rescuer - Brenda Campbell
The Rescue Cat - Frederica Von Stade

Songs: (by Etcetera)
Down in a hole - Alice in Chains
Am I loud enough? - Bis
Make them hear you! - Black Eyed Peas
Silence must be heard - Enigma
Still Can't... - The Cranberries
No Control - Bad Religion
Screams - Psychoviolets
Help us/Save us/Take us away - KMFDM
The Beat - Elvis Costello
Where is everybody - Nine Inch Nails
Upstairs - Wolfsheim
I hear noises - Tegan and Sara
Where to from here - Smart Brown Handbag
Where boys fear to tread - Smashing Pumpkins
There they are - Doris Day
Saved - Pig
Gone - Pulley
Too far Down - The Earthmen
We're all gonna die - Everlast
Getting the help you need - Steven Diamond
Leaving - The Prodigals
Enjoy the Silence - Depeche Mode
The Beat - Elvis Costello
Returns - Rickie Lee Jones
No hope - Antischism
No one to depend on - Santana
We are - Funkmaster Flex
The only help you'll get - Michael Longcor
We die alone - The Black League
Deep down in the ground - Sonny Boy Williamson
C'est la vie - Shania Twain
Show me forgiveness - Bjork
The Beat - Elvis Costello
Silence is Golden - Garbage

The Story: (by Shawn Colvin)
(down in a hole)
Little Boy Lost: Am I loud enough?
Lost Boy: Unrelenting: Make them hear you! Silence must be heard.
Little Boy Lost: Still Can't...No control.
Lost Boy: Unrelenting: (screams) Help us! Save us! Take us away! (the beat) Where is everybody?

(upstairs)
The Rescue Cat: I hear noises.
Jesus the Rescuer: Where to from here?
The Rescue Cat: Where boys fear to tread.
Jesus the Rescuer: There they are!

Lost Boy: Unrelenting: Saved?
The Rescue Cat: Gone. Too far down.
Little Boy Lost: We're all gonna die!
The Rescue Cat: Getting the help you need...(leaving)

Lost Boy: Unrelenting: Enjoy the Silence. (the beat)
The Rescue Cat: (returns) No hope. No one to depend on. We are the only help you'll get.
Lost Boys: We die alone, deep down in the ground.
Lost Boy: Unrelenting: C'est la vie.

The Rescue Cat: Show me forgiveness?
Jesus the Rescuer: (the beat) Silence is Golden.