Duxbury Systems supports Scientific Notebook 5.5, which is still available as a download. The new version, Scientific Notebook 6.0, is not compatible with DBT at this time.
(This topic should really not be under Word, since Scientific Notebook creates its own files. However as it covers a means of producing mathematical braille, we have placed it here for completeness.)
This is a popular product in many areas which essentially produces LaTeX files.
A 30 day demonstration version may be obtained from: http://www.mackichan.com/licensing.net/dnloadreq.aspx
The files produced by Scientific Notebook may be imported into DBT and translated accordingly.