Silicone AUX button not working

Hello world
I’ve just bought a second-hand first-generation Organelle
Everything works fine except the AUX button
I opened it to see and I have the impression that the silicone button no longer has the conductive part.
Does anyone know the part number of this button so that I can buy a new one and replace it?
Thank you very much for your reply

@oweno any clues on where to find a replacement AUX silicone button ?
It’s a real handicap not to be able to use the AUX button
Thanks !

I have really no idea but when you say silicone button I just thought about how I reapaired my old wireless telephone once by lifting up the silicone part and clean underneath on the surface. That made all buttons work like a charm again.