Window opener crank
Definitely sounds like you need new operators. We can help, but your photo here only shows me the base, which only tells half the story. In order to identify a replacement I will need you to remove the entire mechanism from the window so that I can see the whole thing in one photo, without obstruction. Let me know if that will be possible.
Thanks for getting back to us. I'm a little confused--did you need a new lock or a new operator? Or both? We can definitely supply both, if needed.
For the lock, see our 38-097 and 38-098. These are modern versions of your lock, though you will also need a new 38-079 keeper to go with them.
If you still need the operator, I will need to see it removed, as previously requested.