Buy OE black ones. I always do when buying 'new' car as old ones look horrible after all those years (plus new badges, it is all pricey, but worth it if you have new wheels or refurbed ones).
Part number: 36 13 6 781 150, about 90 EUR for a set.
Consider those bolt x20 or buy x16 and a wheel bolt locking set, but choose standard type, not this newer one.