I don't really have an answer for a source, but this thread reminded me that we had rosewood flooring installed about 3 yrs ago and I saved some scrap. Some of my pieces have some nice figured areas and is quite dense. I meant to try to find out what kind of rosewood it is. Now you have reminded me again to research it.
If you could find an installer, maybe you could get some from them. I wish I had taken the contact info for this family operated installing business.
How would you finish it?