I have a couple cheap side cutters that someone attempted to use on hard steel pins. They're pretty much useless as side cutters now, but they still take up space in my tool box.
I can see how with a little grinding, I could modify one of these to become a great tool for clamping into the slots on your pins. A pry bar under the side cutter might be enough to pop the pins out?
EDIT: Just read your last post about breaking the head off one of the pins. The side cutters would have to be modified to fit really well.