How to take off your locking lucks if you can't get the key...

Get yourself a 12 point 1/2" socket, 13/16" if I recall (though it may have been smaller). Hammer it onto the wheel locks and use a breaker bar to take them off. Once off - use a drift punch to remove the lock from the socket. Repeat on the other 3 wheels. Throw locks in the garbage (or keep them if you wish)...or just go buy another set of locks with the correct key for ~$20:
If the socket is a Craftsman piece - you can have Sears replace it for free should you damage it