159 boot hatch door light

[Jorg]

The hatch door of the boot of my 159 has a red/white light (red facing to the rear when opened). This "dual" colour is achieved by two plastic covers, of which the red one broke. I've been looking to get a new one but can't find it. I also don't want it to be too expensive. Would anyone know where I could get one?

I've tried AliExpress but it never cropped up in my searches there.