I have a 00 Laredo 4.0L 190k (yes its seen its days, but it runs great and hasn't given me any problems)

😭😭😭😭 I feel so violated
and my cat converter was stolen today.. I also live in California... Where to even begin... How many are on my Jeep? What's a decent priced new one that is compliant with California law? And is there any kind of device or extra locking to prevent theives from taking it again?