235587 Price comparison Script

Hi, Need a price comparison script similar to kelkoo and price runner. The script should show merchants from: trade doubler, commission junction, ebay and amazon. I also want the ability to add new sites as they become available. The script needs to be easy for me to edit the layout. This should be a simple script for someone with the right experience. When bidding please tell how you will achieve this and any problems that may arise. Thank you, Richard Livingston