BMW would charge you thousands! of drinking vouchers.
Why not investigate replacing the speedo/boost with one of the Chinese Android units from Aliexpress Alibaba websites? I installed one to my R57 with 4G Lite and GPS. Took about three hours including a reverse camera. You only have to match your current dash set up to the pics on their sites and/or email them for compatibility.Most will respond fast and if not, then they were not the right people to buy from in the first place.
Cooper 2009, R57.