locking mechanism fell inside the door

A home owner from USA says:
Can you help the locking mechanism fell inside the door I need a replacement. The rounded corner holes are 9/16
User submitted photos of patio door hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Sure, check out our 82-218 mortise latch. Make sure the dimensions are the same as the space on your door. Also see our tutorial video on how to install it so that you can void this problem in the future!
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