Earlier this year I was searching out hellebore seed; finding a few but pricey! Stumbled upon 'The Alchemy Works' (New Age stuff) All kinds of strange plants and herbs, but very reasonable prices. They had (4) different species of hellebore. http://www.alchemy-works.com/Rain1950- Washington, Zone "8"
Did you know that one of our fellow gardenbuddies Tim Murphy also sells seed collected from the Balkans area. He's a great source for some very hard to find species. Here's a link to the hellebore forum
You could contact Tim through gardenbuddies mail and he will e-mail his list. Just click on his name and in the area that says "my private messages" click on this and it will give you the form to type an e-mail.
P.S., he also sells cyclamen seed and has a list for these too.
Terryk- NY, Zone "6"