They can be found, but MA hasn't targeted the US as heavily as KEF has, to be certain. Last I knew, the North American Importer is based in Canada. A few years ago when I was shopping, I found a distributor in Sacramento who wholesaled to a few local Bay Area dealers. They are tricky to find, but I would say they are likely worth the time for anybody in the market for OEMs at that price point.
In 2018, I would have taken them over anything else I heard if not for Philharmonic.
It would be cool if AH got some to review. *fingers crossed