We have Hellebore 'Philip Ballard' which my father-in-law bought from the Ballard's Nursery in the 1970's.
We propagate this by division on a regular basis.
We also grow some of Jim Archibald's cultivar's such as 'Pluto', 'Orion' and 'Titania' which he gave to us a few years ago.
Hope this is of some interest.