Yes ,I understand what you are saying!! I have one like yours in my hand right how.below is a pic.
The lock you need is one peice. The one you have is the right style but may or maynot be the correct one for your machine.I'm just trying to help you determine that.
Obviously the tumblers are stuck in you lock. To see if it is the correct lock for you machine .
Take top off machine.
Take key out of lock .
Push some tumblers out into out (locked) position .
If it is the correct lock it should just fall into the top but the prutuding tumbers have to line up with the notches.