JW Sliding door handle

Hi, I am Diana. Needing to replace a broken part on my Anderson sliding door, See 2 photos showing the locking lever that should have two "ears" for capturing the lock washer. One of those ears has broken off. Can I purchase the replacement part, or is there an assembly kit available?
In case you cannot help me, please aim me in another direction where I should look for the replacement part(s).
Thank you,
Diana R