I don't know is to what extent PTs are a consequence of the receivers not detecting the incoming laser signal (and the jammers therefore not activating) OR of the jammers just not being sufficiently powerful (or not transmitting a sufficiently broad jamming signal) to defeat the laser gun.
If it's primarily the former, then it seems like a lot of problems could be solved if there were an array of receivers (4? 6?) spread over the front of the car (rear, too), feeding into a cpu that drives the (physically separate) jamming heads. I don't know much about the electronics involved, but I'm guessing that the detection-electronics are a lot cheaper than the jamming-electronics; it this is true, then the additional cost of multiple receivers might not increase the overall cost-to-manufacture by that much.