Don't do it!

Never try to get a small problem fixed at work. If you break your key off in your lock at your desk when you turn around in your giant-armed chair, don't ask the maintenance man to get it out. Just leave your valuables at home. Should you decide to get it fixed, be prepared for the desk to get locked with your keys inside. It will happen. Then he has to pry the drawer open and cart the whole thing away. Oh, the replacement will be deeper, indeed, but it won't match the desk.