Well, I have seen and reported on restocks taking place, and have seen COBRA Commanders popping up.
I have two ( one opened and one MOC for the novelty of it), and have seen others on the pegs.
The big seller appears to be the Alley Viper, with Duke, Firefly, Storm Shadow and Beachhead selling slower. The others are moving at a nice pace, it seems--though Doom cycles and Ghost Hawks are not moving fast.
Smaller centres, like those in my province of Saskatchewan are easier locales to find these in. Obviously, the more population around you the harder they will be to score the more popular ones.
If you can, hit some of the outlying places around you.....if you are travelling. Keep trying.