I have a friend who owns a ranch in Hawaii with almost unlimited access to all sorts of native woods. He has pen blanks available for sale. He will send a box of 140 blanks, mixed woods, for $50.00, including shipping. He recently sent us a box and it had Formosa koa, peacock wood, curly eucalyptus, and several other "dunnowoods" in the box.
If you are interested in getting a box of these blanks, please PM me and I will put you in touch with my friend.