Need power cable for External HDD

[Ethan_Kaizer]

My friend just gave me a Western Digital 640gb My Book external hard drive, which I could get a lot of use out of.However, he lost the power cable a while back, so I need to replace it somehow. Where can I get a power cable that will work for it, without spending too much?

 

[Kharn]

What model is it?

 

[KSoD]

Welcome to Western Digital US Online Store

I think WD has this stuff itself.