Probably not a lot of help but they are available in the UK, part number 36112459620.
Deep breath, £4603!
Star markingRDC (Tyre pressure monitoring system)RSC (Run-flat tyre)Suitable for snow chains
Front: Wheel dimension: 8Jx20; Tyre size: 225/35R20 90Y XL; Tyres: Pirelli P-Zero r-f; Fuel efficiency: B; Wet grip: B; External rolling noise class: B; External rolling noise: 70; Snow grip: No; Ice grip: No
Rear: Wheel dimension: 8,5Jx20; Tyre size: 255/30R20 92Y XL; Tyres: Pirelli P-Zero r-f; Fuel efficiency: B; Wet grip: B; External rolling noise class: A; External rolling noise: 70; Snow grip: No; Ice grip: No
https://www.bmw.co.uk/en/topics/owne...figurator.html