Front Seat Power Adjust problems of the 2001 Jeep Laredo

I own a 2001 grand cherokee Jeep Laredo 4x4. The problem is with the eight way seat. The hinged actuator that the seat is mounted to has fractured causing the seat to become unstable. I performed tests that revealed cracks in the welds and in the component parts themselves. I have been in contact with Jeep and they say there is no problems with that model and the seats. They will not replace the part because the feel its not a safety issue.