I am a Physical Therapist and am trying to help a parent with carseat problems. The child has cerebral palsy as well as autistic like behaviors. He has broken several chest clips on standard carseats. He needs to be in a 5 pt harness and is over 40lbs. Any suggestions on what we could do to prevent him from breaking the clips? Are there any metal clips out there? Something we could attach to the clip? help?? I tried ordering a medical model carseat, but this was denied by insurance and I am not sure those clips are any better anyway. Any suggestions wouldbe greatly appreciated.