SlowRVR

I'm trying to swap out the heater core in my '92 over Christmas. I'm sure those of you with experience taking the dash apart will be absolutely shocked to learn that some of the pieces of my dash are cracked! Has anyone had any luck repairing broken bits of the dash with some sort of glue? I was thinking model cement, but that is not really very strong. Any other suggestions for bonding the plastic back together?