I would avoid cutting or rewiring because it might break the fan. My recommendation would be just replacing the 120mm fans. You could buy them online or at a retail store, better yet I'm pretty sure someone will be willing to trade a regular 120mm fan for a blue LEDs 120mm fan for free.
I guess that you work for Antec. In this case, and if possible, I would like to know if the ANTEC EARTHWATTS 500W model ( http://www.antec.com/Believe_it/product.php?id=NjU=
) (not the 500D model) is nowadays made by Seasonic or Delta.
Thank you very much.