Download stock market \ share prices into a formatted .csv file

Hello, I have some software which requires stock market data at the end of each day for specific stocks, I have attached an example file. Requirements are: 1. Outputted file needs to be in CSV format and hold the following data: STOCK SYMBOL, DAYS DATE, OPEN, HIGH, LOW, CLOSE & VOLUME i.e AADV,20130423,69.1,69.5,69.1,69.5,7933 2. I only want information for the stock codes present in the example, no more and no less 3. The outputted filename ideally wants to be named as the days date i.e 20130423 4. I don't mind if its a script, hosted on a site, a URL typed into yahoo finance as long as the data can be got daily. IMPORTANT: The formatting of the file is critical, as is having the identical stocks. I do not mind where the data comes from, essentially a need to get a duplicate of the attached file at the end of each day.