Patience, man. It pays off. I've been sort of semi-passively looking for a pair of those nice 1980s Mavic track hubs for quite some time now. I've missed or lost couple of Ebay auctions and turned down an offer of a perfect pair because of high asking price I but just got this in the mail today.
Now I only need to track down a matching 28h front hub AND pair of 28h Mavic Open Pro CD or similar hoops. Oh, well.