I'm not too sure if the brake of Blitz Scooters is the same design as the real Blade brake everyone uses. I don't think it is the same though.
Not sure about Schwinn too but you can get these brakes from Blade Scooters. Blade and Madd Scooters are the same thing. I think the company just changed the name.As far as I know ,Blade Scooters can be bought in Australia. I do not know any other countries which sells these scooters. I suggest that if you want a Blade brake , you should try to buy it off someone from Australia , just the brake alone.
If you do not know what a Blade brake looks like ,
Finally , if you get a Blade brake somewhere , you got to learn how to put it onto your scooter , here is a tutorial.
http://www.youtube.com/watch?v=pyujBRxCo64
I hope you get a clearer view on what Blade brakes are.