To be honest, there's nothing magical about exercise for altissimo, they are basically the same as any other technical fingering or tone exercise but extending up into the altissimo register. All you need do is practice them up a semitone each time you learn a new altissimo note.
Simples
Oh, you make it sound oh so easy, it took me over a year with Raschers top tone book plus your fingerings, to get to a point were i can confidently use any of the first range of altissimo notes (G-F).
Although maybe a good technical exercise, is it really necaserry to develop the second and third range of altissimo notes? and if so were would you use them?
Simples? definitely not!!!