Where do you live - I'll send somebody round to help you look... he-he-he...
Try Google - select Images - search for Power Cord
When you see a picture of the one you want you may be able to get a description - in most countries there are only a few power cords in common use - have a good idea of the style and pin arrangement of the socket in the back of your TV before you begin searching.
Chances are any electrical shop, DIY or H/W store will have the one you need. Probably Amazon too.
Good luck...
Peccavi, May 2009