Which parts?

A home owner from Maryland says:
I ordered 82-107 because it had broken off but when I went to install
It and checked the mortise as recommended it doesn't turn so looks like that needs replacing too Looking at my photos what mortise do I need? It is 11.5" long and the holes where it was screwed into the door are 11" apart. Also the handles are fine but lost the key so would 82-310 be able to be fitted on this handle and new mortise or is there a set that would be easier and compatible?
Thank you
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Casey from SWISCO responded:

Hello,

Take a look and compare the dimensions of the 82-265 mortise lock to your assembly. I also agree that the 82-310 key lock would be compatible with your original hardware. Take a look and let us know if you have any other questions. Thanks for posting! 

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