You don't need new doors, you need the hinges adjusted...just like when your doors start to sag IMOWell not actually a gap but more of a closing flush issue,they close and lock fine but the right side is not flush with the left.
As Beach suggests, adjustment is the answer, if you replace the new one will need the same adjustmentWell not actually a gap but more of a closing flush issue,they close and lock fine but the right side is not flush with the left.