Here is a terrific Internet community for blackbelly breeders.
International Resources for Finding Barbados Blackbelly Sheep
There is a hair sheep organization (Nolana-Netzwerk) in Germany organized by Dr. Ralf Minhorst (http://www.nolana-schafe.de/de-pages/der-verein/der-vorstand/). He would be a great contact for sources of Barbados Blackbelly sheep in Europe.
Here are some contacts gleaned from their web site:
A friend located two small flocks of Blackbelly (Kamerun Schafe) in Germany. One flock was at Kloster Eberbach (see http://kloster-eberbach.de/en/monastery)
If you know of breeders elsewhere who would like to be added to this list, please contact me.