I got two aftermarket keys with fobs for our commander on eBay, as long as you have two original keys you can program the new key. I used the case button and battery to swap one of the oem keys that had worn-out (missing) buttons. The other aftermarket key works ok but not as good a range as the oem
If you can find the part number you can search for a new mopar keyblank with remote, a couple places had used oem remotes supposedly reset with a fresh key plank. Was tempted to try them but didn't need another key.
If you get new keys Just get a local hardware store to cut the keys and use the two original keys to program them to the pcm. They usually send vehicle specific instructions with the keys, well for aftermarket for sure, some resellers do as well for oem just to avoid returns.
At least that is how it was for our 06 commander.
Sent from my iPhone using Tapatalk Pro