M.R.
http://www.amazon.com/Stoplight-Sleep-Enhancing-Clock-Paj...
I saw this clock in a parenting magazine and googled it. It has a stoplight that you can set to turn green at whatever time. That way if she wakes up and sees a red light she will know it's not time yet. Not sure if it will work, but I thought it sounded interesting.
Here's another one. Good luck. No sleep stinks!
http://www.google.com/products/catalog?client=safari&...