After reading about the amount of Catylitic Converters being stolen for the purpose of 'weighing them in' for the precious metals within them had me thinking, is there an underbody detector that could be fitted to alarm if anybody crawled under the vehicle, I ask this question of any reader but specifically of Davenewell or Eddievanbitz who may, if one is not available develop one themselves (I have a Boxer and since reading of these incidents keep imagining I hear noises in the middle of the night)