Yes, there's a way to make the car learn about a new key. Give me a few minutes and I will look it up. Not sure about getting a new one cut, but a good locksmith should be able to do it for you...

Edit: Here you go:

From the service manual page 8N-37:

STANDARD PROCEDURE - TRANSMITTER PROGRAMMING

The Remote Keyless Entry (RKE) Transmitter(s) can be programmed by the customer without special tools.

PROGRAMMING PROCEDURE

Transmitter programming by the customer is done by performing the following steps:

1. Press either the lock or unlock button momentarily twice.
2. Turn the key in the ignition switch to the ON/RUN position within 30 seconds.