From the original post, I understood that the ball and the shaft of the pin might be separated. A few snips of thread used to sew on the binding would get rid of the ball, but the shaft is going to be hard to find, especially since you really don't know if it is in there or not. But how would the ball get in there with out the shaft.
A lot of careful squeezing all over will be needed to find the shaft, and then it will come out easily.