Not sure on the year/application but 84mm mounting centers should work. Also when you hold up the caliper in the position it will be mounted on your bike, the bleeder should be on top, but apperantly not necessary.
I think I saw a post that Nitto used one from a 2007 duc 695 if that helps. The list on that link may not be complete. Mine was from Duc 900 Monster year unknown but worked out perfect.