Replacement part needed

A quick learner from Dallas TX says:
Hello,

Please see photos of the part I need to replace in my partition door. The hardware says Knickerbocker but I am unable to find this part. Do you guys have it or a suggestion on how to replace with a working door lock?
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Emily from SWISCO responded:

Hi there!

Start by having a look at our 10-556 knob assembly. Compare the specifications with yours and see if this matches what you need. 

How to install the 10-556 lavatory knob assembly.
How to install the 10-556 lavatory knob assembly.
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