I am wondering if anyone sells the later style diaphragms for the door actuators. These are the little exterior diaphragms that slide down over the actuator rod that connect to door. I actually repaired one by impaling it on a small stick and spraying 3M rubberized spray over it which sealed the small tear -it then held vacuum! Can't help but think there is another piece of rubber fitting out there in the world that would probably work for such a simple application -any thoughts?