Always a useful, if fiddly, addition to any kit; could have definitely used someone's PE for Trumpeter's KV kits years ago to address numerous detail failings.

So... who carries this brand here in the US?

Compared to Aber, Voyager, and others, I think Passion sets are far less fiddly. They usually include just what you need, not lots of needless parts which should never be replicated in PE or where the kit part is perfectly fine. Plus, they do lots of extras, like these sets where the tool bin lids and rear air deflector are pre-formed, or including turned parts like the MG barrels and pistol port plugs seen here.

. Not sure who sells in US, but perfectly fine ordering them from HLJ, Hobby Search, or Hobby Easy.