Those Tuchel connectors production has stopped a long time ago. But Neumann says that binder 691 can be modified to fit...
See this thread for reference:
http://www.neumann.com/forums/view.php?bn=neumann_mictec&key=1250727002&v=f
And here is the female connector, though the pic shows a 3 pin :
http://www.binder-usa.com/psearch_detail.php?pid=5204
Axel