Price comparaison Website

Hi We are looking for a price comparaison plugin (for a cms like joomla). This plugin have to check over websites (that i can add in future) for the price of some listed items. Items have to be list with all prices avaible and a link to the shop (with affiliation information). the fonction have to be the same as : [login to view URL] or like : [login to view URL] (very better looking - more near from the solution we need). Prices haves to been display in euro (optionnaly in $). We need warranty of your skills.