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I don't know where your home is.
I'm lucky that I found a car upholsterer, who also does a good job, within a 10 mile drive from me.
You can find the short description of how to de- and install the B-pillar trim under this link. Good luck!
Regards Uwe
https://www.youtube.com/watch?v=PsJBv6hjYAM (Upper fairing minutes 1-3 / 7-9)