Their embassy on the mainland is long gone; the house they were using as a White Roses base likely as well.
I still have dreams of creating an Amazon island on the grid some day, and I want to make a little corner for a large, dignified house with little cottages for my fascinating sisters from another world. I would name the cottages after the Herthean nations, arrange them around the manor, and make a bit of beach just for them to access as they like — or maybe even make an islet just for them and their new embassy, empty and waiting for appropriate residents to return.
I found this thoughtful post that fills in a little more than what I knew — What’s Aristasia? A Long Post - My Experiences and Thoughts, from two and a half years ago. Every culture changes over the years, of course, even on Paradise Island, although there less than most; I would be sad to see this one diminish and fade entirely. The current aether-site is Daughters of Shining Harmony, with links to the Chapel of Mother God, an aetheric discussion site and other relevant places. Their Encyclopædia seems to be broken at the moment, unfortunately.
There was a vision once of seventeen Silver Laurels, Amazons and Aristasians together, supporting our own little land on the grid. How they would love the new mesh looks, and better wigs and smoother skins! I dream it alone for now, but perhaps some day....