isn't it just a standard kettle lead?
if it looks like this: http://www.xinrek.com/image/product/iec-c13-roj.jpg then it is.
BUt it's actual name is an IEC C13 lead. obviously you would need one with your lcoal country plug on the other end, so for UK, it would be an IEC C13 to UK Plug 3m (for a 3metre cable)
Any PC would use the same one so just buy one in your local area, and it will cost you only a few £/$'s