Also following, as these seem to be the main (only?) option available at the moment: https://www.2xcite.co.uk/product-category/z4-angel-eye-headlights/
A quick search for "2xcite" should bring up a few threads of interest. Consensus seems to be that, in terms of their road lighting ability, they're no worse that the standard unit, maybe marginally better, and the angel eye aspect, while functional, could be a tad brighter. Aesthetically I think they look nice, especially with black internals.
They also come with an "eyebrow" light which some folks like, others not so much, and it takes some time/patience to wire (and possibly code them out) so that it doesn't throw a bulb error.
Either way, in the absence of alternatives, they're what I'm considering unless folks can suggest a different product. (I've no desire to modify my existing units).