I am trying to develop a pairs strategy based on stocks in the S&P 500 index.  I have access to all of the historical price data I need, but I am having a hard time finding a list of all current S&P 500 constituents WITH the GICS classification.  If I don't want the GICS classification, there are a number of places to download a list of current constituents, such as standard and poors yahoo finance to name a few, but none of the sites I have found include the GICS classification data.  Anyone have any ideas where I could get this info?

Thanks.  Ryan