Unfortunately this code took me the better part of a day to get right (and clean)  I figured I would share it with the community.  the GetDependencyObject method can obviously be used to traverse any dependency object.  Enjoy.

object CellControl = new object();
GetDependencyObject(OccurrenceGrid, typeof(AddNewRowSelectorCellControl), ref CellControl);
RowBase Base = (CellControl as AddNewRowSelectorCellControl).Cell.Row;…