Some decent stainless valve stems are available from BMW (36 12 1 119 332).
https://www.ecstuning.com/b-genuine-...r2eRoCrKjw_wcB
They'd be perfect for polished lips, but I'm not sure how they'll look with the standard painted finish. BMW shows rubber valve stems being used with these wheels, with no metal option BTW.
https://www.realoem.com/bmw/enUS/sho...diagId=36_1392
https://www.ecstuning.com/b-genuine-...r2eRoCrKjw_wcB
They'd be perfect for polished lips, but I'm not sure how they'll look with the standard painted finish. BMW shows rubber valve stems being used with these wheels, with no metal option BTW.
https://www.realoem.com/bmw/enUS/sho...diagId=36_1392