What you are looking for is being developed by LOGAL. Try their web site
www.logal.com and go to the VMBL link.
What I have seen so far is VERY good and could definitely work the way you
want. If you need any more info let me know and I can give the name of a
person in Boston to call.
Cindy Schwarz
AssociateProfessor of Physics
Vassar College