piezo shock sensor

Where can i buy one of these sensors?From what i read on here they are triggered by cabin pressure.I have a regular dual stage shock sensor and it sucks.Loud truck drives buy it triggers,hit the door or fender and does not.I searched the web and found little.Thankscolorado tap the rockies

The dual stage shock sensor I have uses a piezo element for sensing. Have you tried repositioning the sensor and adjusting the sensitivity? There are other types of sensors that use microphones for sound detection, but don't know if they'd work better for you. Not sure what a sensor for cabin pressure would do; sounds like it would need actual glass breakage to trigger, which is probably only seconds away from the door opening anyway.