The only thing that came to mind when I read it was the copy of Quanah Parker daughter's wedding dress. I think this would belong the the family and I know some are still alive and well. As you say about another thing I would think they would need family permissiion. But the site doesn't say anything about that. I can't remember if this site has come up before or another like it in the UK, I will check. But I think the other was in London.