You need to do research...
You need to discover the connector style on each end - if the manufacturer had any sense he would use a common type receptacle on the machine end - and the style of connector in your house will easily dictate the other end.
Next you need to determine the length of cable you need.
When you have all this - Amazon or a DIY store or an electronics shop should be able to fix you up.
This link might help in identification...
http://en.wikipedia.org/wiki/IEC_connector
Good luck...
Peccavi, November 2009