Hardinge taper nose chuck locating pin

Like an idiot, I have broken my Hardinge HLV 3 jaw chuck location pin. There is a location cap on the circumference of the chuck over the pin, which I have removed, but I cannot see how to remove the old pin as it is way down inside the hole. Any ideas?

I have a new pin which I think may fit, but am unsure if it is correct one. Does anyone have the dimensions of these pins so that I can check? Does anyone retail them?

Russ