Sunroof spares question

Hi all,



My sunroof decided to stop halfway closed at the weekend , unfortunately it did rain on the way home!

After stripping it down i found the cog that sits on the motor shaft has fractured.



Is there a spares solution for this or does the cog come complete with a sunroof assembly or motor assembly? Obviously the motor and the sunroof track and drive are fine, it's just the cog.



Yours Hopefully!

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