My understanding is they are sold to/licensed to an existing German company, so my semi-educated guess is that in W Europe it is the parent/original company that is a known entity people purchase from. Offhand I cannot recall the name but a search through aikiweb might reveal it.
aikido24 only was set up for selling Bujin hakama. It didn't exist before.
There are some well known companies here selling hakama. And a whole lot of people wear hakama from Japan like Iwata or Tozando.
So I think simply nobody knows Bujin hakama around here. I myself only know about them because of aikiweb. And from attending a seminar of Ikeda sensei.
In which way are those hakama different?