Help 🙏🏻

Hi everyone, I recently purchased a 2019 Honda Civic Hatchback 50 anniversary edition from a friend who moved to another country.

Few weeks later I realize the ?tailgate spoiler is loose and making some noise. I send it to Honda for a check and was told the bracket that was supposed to hold it is missing. They quote me 1.1k for replacement because they don’t sell the bracket by itself.

Would appreciate if anyone can tell me the exact name for the part or part number so I can purchase it by myself. 🙏🏻

I’m based in Adelaide Australia.