Stachura again - very fine quality and you will pay accordingly.
I just needed some 2.5-3mm ones, and someone recommended ArtBeads
which had them at a much cheaper price. They just came in and I
haven't had time to look at the quality. Fire Mountain Gems also has
some, and theirs are usually quite dependable quality. They just
didn't have the exact size I needed, but did have smaller ones.
Three Cats and a Dog Design Studio