Lost key for Black and Decker 1215 type B Radial Arm Saw

I was given a Black and Decker model 1215 radial arm saw by the father in law and until now havent had a need to use it. My problem is that somewhere along the line the key has gone missing meaning it cant be operated. Can a replacement key be found anywhere or is there a fix that will enable me to make the saw useful once more.