Automatic Feedback Email Amazon

I have been using 'feedbackfive' for automatic email feedback for amazon, but the system for the lack of better words.. sucks, it is outdated and doesn't work most of the time and definately does not send emails automatically. I want a simple php script created to download my amazon orders completed, setup a crontask to automatically check if it has been 7 days since the ship date and then send out an email to this user with my template format and a link to post their review about their order. Doesn't need to have a fancy user interface. I just need something that is reliable, simple and works Preferable to have someone that has worked with amazon before to create a custom feedback solution. We need this done quickly and cheap.