Toyota Prado cracked dash

My 2004 Toyota Prado has developed a significant crack in the dash over the past six months. I had New life Vinyl come out to repair it, but they refused because it was over the passenger airbag and they believed that repairing it could affect the proper deployment of the airbag in the event of an accident. The guy did comment that he had recently seen other people writing in to your column about the same thing in the Prado and I was hoping to get some more information as to whether it is a common problem in these cars and if I have any recourse with Toyota. The car has been very well maintained since new (one owner, parked in garage/carport, never gone off road, serviced by a Toyota dealer the whole time, etc).