605 Gear lever stick problem

Hi, I have a 2.0L, Manual 605 Srti,1995, and just recently the Gear lever Stick has come loose and seems to have come out of its socket and now won't go into any gears, had to tow back home. Can anyone tell what this problem may be and is it an easy fix. Also any links to diagrams would be most helpful. Much appreciated. Many thanks.