The screen is connected to the device by a ribbon cable on the left side with the power button facing you. Do not try to completely separate the screen from the device yet, and be careful.
Gently pry the screen loose using a plastic opening tool.
If the screen doesn't easily come loose, more heating may be required
I'm also finding it difficult to buy a replacement screen too. Has anyone discovered some. I thought this website was selling some not too long ago. Any more coming in?