Replace 03 ford focus key?

I've lost my car key to a 2003 ford focus. The key wouldn't need to be programmed (I don't think) because it doesn't have the lock / unlock buttons. (I have a separate thing for that.) how much will it be to replace it? I won't have a key for them to copy, just creating it based on my VIN #, make and model.

A locksmith won't be able to do it. All they can do is clone an existing key. You'll need to pay the dealer to program the computer to accept the new key. Once you have a key, some locksmiths and places like Home Depot can clone it for $70.

Each key contains a chip that operates the immobiliser. This needs to be programmed to the car by a dealer or specialist.

The key does(I'm certain) need to be programmed. Only a dealer can do that if you don't have at least one key and they make it from VIN information.