This probably isn't too helpful, but..
I've been trying to hunt down racers/trainers myself in Canada for the past month, and aside from the Blue Chlorine Racers and Pink Blue Squadron Trainers you regularly see at the Nike Factory Outlets, the other CW are extremely difficult to find (Niagara did a MC racer restock a week ago and it was gone in 1 day)!
You gotta either wait it out, constantly calling Factory Stores, and get lucky, or go to the states..
It also suck that (last time I checked) we never even got any release of the summer collection here (i.e. Oreos, Black/Laser Crimson, Lucid Green).