* Online Retailers: Sites like Amazon, eBay, and others specializing in auto parts will likely have them. Search for "2004 Chrysler Pacifica key fob casing" or "2004 Chrysler Pacifica key shell." Be sure to check the reviews and ensure it's compatible with your specific key.
* Auto Parts Stores: Local auto parts stores (like AutoZone, Advance Auto Parts, NAPA) may carry them, but availability can vary. It's best to call ahead to check their stock.
* Key Replacement Services: Locksmiths and key duplication services often sell and install key fob casings. They can be a convenient option if you need help transferring your electronics.
* eBay or similar used parts sites: You might find a used casing in good condition, but inspect photos carefully for wear and tear.
Important Note: The casing is just the *shell*. You'll need to transfer your existing electronic components (the transponder chip and possibly the battery) from your old casing to the new one. If you're not comfortable doing this, a locksmith or key replacement service is a safer bet.