They're around if you look - they are rare, but don't trade at much of a premium over the standard Speedmaster (if any at all). Missions patch Speedmasters pop up often on eBay or on dealer sites.
This to me is a good example of a special edition which adds nothing aesthetically in its own right. I feel that the portrait sub dial is a disfigurement of the basic Speedmaster dial which is perfect in its standard form.
Try http://www.watchrecon.com , set an alert there & on eBay and you should find one sooner or later. Many dealers price them high thinking they're worth it, but I wouldn't pay too much. Godspeed!
One passed by on chrono24 about 3 weeks ago and was sold as a full set asking 3.500,-€ Was gone in a few days. I liked it but was too late.
I'd agree. For me the mission patch LEs would mainly be of interest to people trying to collect them all. As a one off daily wearer, nah..