car builder solutions sell a ready made kit here -

https://www.carbuildersolutions.com/de/black-indicator-buzzer-with-diodes

or you can buy a buzzer from e.g. Maplins or eBay and a couple of diodes and make your own up fairly easily.

I have similar in my Aero and it works well.... thumbs

James

Aero8 , Series 1 - Boston Green
RR Evoque P300E Autobiography
Smart Brabus Convertible
Monkey Z125