A fellow club member of mine had them from R Forbes and did quite well with them until he packed up.
If anyone wants the old, old, old dark Busschaert lines, I know of a man that has countless numbers of them. They go back through the Coppi, 45, Muskateer lines. He keeps only the Dark Busschaerts and trys to keep the blood as original as possible. He is also a mine of information on them. PM me if interested. Also on the plus side, he's not expensive.