Mike
If you have the glove box lock that goes above the door, there will be a clutch head screw holding a sleeve over the lock. Remove that screw (from behind the dash) and the sleeve can be removed. As far as a key, if you're lucky, the key for the glove box will be the same as the door, and you can find the key code stamped on the door lock near the lock shaft after removing that lock. Let me know the code and I may be able to help out with a key cut pattern.
What Mark said about finding a key that roughly fits, I was able to do that with the ignition switch that I had no key for. Once I was able to get the cylinder out, there was the code that was slightly different than the one on the key that I used to remove the cylinder.
