Eta 2824 with a broken part, can someone give me a tip?

[ryaku]

Hi guys,
i tried to fix the release key but after several tries something went wrong and a little piece got broken.
I used a screwdriver of the right watch and followed a tutorial but with no success.

Here is a pic of the broken piece:

Do you think i can get a spare part?
Is here someone who can fix it here?

Thank you

 

[Dizzy]

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