Alexa Top Sites Updating Script

Good day, We have a CSV database with a listing of roughly 2000 websites for s specific niche market. Our website which uses the database lists the websites based on their Alexa popularity – from most popular to least popular. What we would like to do is update the Alexa ranking for each website each month by: - Exporting our CSV - Plugging the CSS into an application which updates the CSV file based on the alexa ranking - To then re-upload the database onto our server. Alexa offers a top site webmaster program: [login to view URL] and ideally we would like to use this paid service once a month. So what we want is someone to design a simple application (web based or not) which will allow us to update easily the Alexa ranking for each site in our database. I look forward to your ideas and proposal, Vincent