I bought an extra one on ebay for $35. I just have to get it cut.
This is straight from the Crossfire manuals supplied to the dealership, or if you are a Chrysler tech.
STANDARD PROCEDURE - TRANSMITTER PROGRAMMING
The Remote Keyless Entry 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: - Insert the key into the ignition switch.
- Press either the lock or unlock button momentarily twice.
Turn the key in the ignition switch to the ON/RUN position within 30 seconds.
Hope this is useful and saves you $100.
Haven't had my key cut so I don't know if it works yet.