Actually I gave them two ways to eliminate the parasitic drain: replace with a working spy unit or disconnect the non working spy unit (the status quo would leave them with continuously dying batteries).
Plus, let’s be real: the chances that anyone cares about any one person’s location is slim to none (barring political figures, billionaires, and celebrities). If you are worried about the mass collection of people’s locations, dropping one person off the Subaru map will have zero impact. Taking away a Subaru data point does not do anything about cell phone GPS, cell tower triangulation, EZ-Pass tracking, traffic cameras, or licence plate tracking (and those are just the car based tracking systems off the top of my head).
Try your local middle schools and libraries. Most have 3D printers these days and are likely to be a good continuous source of failed prints.