Patio door lock is broken

A home owner from Bloomingdale, IL says:
Our house has been 25years. This kinds of door lock is not sold on the market like homedepot and ACE. Is there any way to find this locking system? If you see the first photo, small part is cracked.
User submitted photos of patio door hardware.
Profile picture of Tom
Tom from SWISCO responded:
Thank you for contacting us. Unfortunately, we no longer carry this style of handle set. However, we do have a newer version, 82-009A. Please compare the measurements on ours to see if this will be a good fit for you.
A professional from CA says:
If you like the wood handle, you can probably replace the innards of the old one with the new ones. I've done it many times, but no guarantee yours are compatible.
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