Looking for a SMALL 400w PSU

Can anyone help me find a cheap PSU that is atleast 400w that has a very small form factor that fits a 24pin ATX board? I'm having some issues with size, big time. Thanks.

Are you looking for an SFX sized PSU? The SilverStone ST45SF-G is the best of its size.

http://silverstonetek.com/product.php?pid=342&area=en