Waniek, did you manage to find a solution? I have the exact same problem - The rubber top of the button fell off, everything works but I have to use a toothpick or something to push the button.
I'd rather not improvise and try to replace the part with the same one, but so far I found nothing.
I have an original Yamaha sub cowling for FZ6 S2 (2008), but got no brackets to fit it on. If someone has a spare mounting kit I'd be interested in buying it. Any help is much appreciated.
By the way I'm from Croatia, and new on the forum. I'd like to say hello to everyone and congratulate...