Lavatory stall latch handle

A quick learner from Manheim PA says:
Your part 10-561 did not fit this latch mechanism. Will the 10-563 ?
User submitted photo of their handle.
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Paul from SWISCO responded:
I actually don't think the 10-561 can fit in t he 10-563 . The 10-557 does, though. Could that be what you need, instead?
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