seemingly available through various merchants recently. great time to buy, i never ever see them for sale. all your go-to's have em. just figured i'd let brothers know. although i'm probably late to the news.
I have had the best Opus luck at B&M's. Find one near you with an opus account. They are usually only released a couple times a year so that's when you have to find them mostly. If you find a good shop they won't gouge you like some of the Internet shops.
My local doesn't carry a great selection, but they do get Opus X. They don't often get the more limited Opus, but what they do get, they sell at reasonable prices. They treat me good.