Audi Q3 Boot sill light sensor

[Antwon]

Hi all, 

I have a Q3 2015 model and the boot sill switch is damaged therefore the rear lights do not turn as it defaults to the back up light. I have removed the metal sill and re-installed the magnet and it works for awhile before it dis-lodges again. Does anyone know where I can get this replacement part any other ideas are welcome?

Thank you in advance for any information

[Steve Q]

Have you tried eBay?.