>I need two network cards with the same address,
>Does anyone where I can buy two/another card
>with a specified address?
>
>I want to set up two PC's to look exactly the same.



The NIC address is hard coded, and you literally can't buy two the
same.
If you're talking about the IP address, just set it that way.
Obviously both computers can't be on the network at the same time.