HTML to Image

Looking for a scrip that capture's an image of website's on the fly must be able to support all browsers and written in PHP. I dont want scrip that just uses a browsers rendering engine as it wont work across all browsers. max will pay is $30 as I believe there are scripts out there already that do this. site similar to what looking for is http://bluga (dot) net/webthumb/ don't care if you resell source, i just want the script