At work we have a bunch of internationals with DEF systems and bad (and impossible to find) QLS sensors.
On a case by case basis international was reprogramming the QLS out of the system as a workaround, w/mandatory restoration to original configuration once new QLS sensors become available. These are better known as the big orange IDOT dump trucks that plow the snow off the highways.
They won't preorder any, won't "make a case" for any truck that doesn't yet have specific codes showing up in the computer, and no assistance at all anywhere besides at the dealer itself. So once the codes appear you have no choice but to limp it to a stealership, before they did the temporary program workaround they had bunches of state trucks littering their parking lots waiting for replacement sensors to arrive. What a batch of BS