So the 2 keys you have don't work in the lock cylinders ?
Personally, I would remove the lock cylinders and take them to a locksmith and have the cylinders re-pined to match the keys that aready work in the ignition cylinder. Cost $20-30.
Removing the lock cylinders is pretty easy
- Remove interior door panel
- Release the rod that connect the cylinder to the lock. You may have to re-use the plastic clip on the end of the lock cylinder so be careful not to break it.
- Remove spring clip that holds the lock in place.
- Reverse step for re-assembly