Shifter interlock button

The interlock button jumped out of the shifter handle. I can gently put it in the hole and it shifts normally. The end of the button broke off that keeps it in place. Can I buy just the button, if so will it snap back in? It looks like it works like an electrical plug with a couple of little ears on it that keeps it in place. The very inside end broke off, about an 1/8", which is where the catches were that kept it in the handle.
i removed the little horseshoe clip facing the dashboard, but the handle does not want to slide up off the shaft easily, I do not really want to force it cause there is a wire for the EOD I do not want to pop off. Is it just twenty one years stuck in place or is there another screw or retainer I do not know of? Where does the EOD wire unplug, is it under the console cover somewhere or under the car on the transmission?
Thanks in advance.