That would be a question for the vehicle mfgr. Since they use a wireless signal from the factory sensors to your dash readout, it is logical the mfgr would have what you seek. The downside to that, it would probably be less expensive to just do as Hipshot and buy 4 more aftermarket sensors ($120) for the towed.
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"