What you describe is made for certain vehicles, but I have not seen yours listed. You would get better security by adding a deadlock to each door. This would have a separate key completely. I added home front door type 5 lever deadbolts (screwfix 13 pounds each) to my camper van. You can get dedicated car ones from accessory shops. It won't stop them breaking the window, but even then the door won't open!!
MrCheerful