i have had some pretty sweet luck with the warhammer/citadel paints
They are a bit more expensive (about $4 each)
Regal Blue matches the Neo-viper blue pretty good

and enchanted Blue is a good match for the blue of Scap Iron

I think they are wonderfull paints to work with too
I havent' looked yet for a 'default cobra' color, just those ones
I am actually coming to montreal next week and if you'd want to check them out and compair the colors in person, that should be fine