Hi Dominator.
While it’s not our area of expertise … some of the information in post #3 here and the additional articles, posts, and topics it links to should be helpful with regards to questions about bedding. You can also see every thread on The Mattress Underground that mentions goose down by clicking here.
I know many of our Trusted Members sell bedding, but I cannot say for certain if any of them carry goose down.
If anyone has had a factory direct experience with goose down bedding, we hope they weigh in!
NikkiTMU