Looking for lock for Andersen handle 39-291

A home owner from St. Paul , MN says:
Andersen Lock Handle
Product Code: 39-291

I am looking for the lock this handle is made for. The handle broke off, and along with it went the piece that snapped into the handle. Nothing is wrong with the handle, but its the lock that is now broke, but all I have to work with is the handle with the broken piece in it.

Are you able to help me identify which lock should work for this?
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Casey from SWISCO responded:
Sure, you can see a list of all the parts related to the 39-291 on the right side of that page. They should be listed under Related Item(s).
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