2008 IC BUS CE Structureframe And Members Problems

I HAVE A SERIES OF 2008 CONVENTIONAL IC SCHOOL BUSES (21 BUSES) THAT WERE PURCHASED NEW IN JULY 2008. SINCE THE BEG. OF THE SCH. YR, (AUG. 20TH) WE HAVE HAD 5 ENTRANCE (EMERGENCY) DOORS SHEAR OFF AT THE TOP OF THE DOOR AND FALL OUTWARD, BEING HELD SOLELY BY THE BOTTOM PIN. THIS IS A HUGE SAFETY ISSUE. IF THE BOTTOM PIN WERE TO GIVE WAY ALSO...THE DOOR WOULD FALL ON THE CHILDREN THAT ARE LOADING OR UNLOADING. I HAVE BEEN TOLD THAT THESE DOORS ARE DEFECTIVE AND THAT THERE IS NO PLAN TO RECALL. NO ONE KILLED OR INJURED...YET SO THE DEALER SAYS THAT THEY ARE JUST REPLACING THEM AS THEY BREAK OFF. IS THERE ANYTHING IN THE WORKS TO RECALL THESE BUSES BEFORE ONE OF THESE DOORS FALLS ONTO A SMALL CHILD? I HAVE SUBMITTED THE INFO. FOR THE FIRST VEHICLE HAD THE PROBLEM. IF NEED BE...