This is the Koleston I use: http://www.amazon.com/s/ref=nb_sb_ss_i_6...a+koleston and the peroxide is available there too : http://www.amazon.com/s/ref=nb_sb_ss_c_3...e+peroxide
I notice `Black` is not shown there but it is available normally ....there are many many makers of hair colors so if you can`t get black [if that`s what you require] in Koleston on Amazon, just search for a different maker/brand-name....
http://www.amazon.com/s/ref=nb_sb_noss?u...&x=17&y=15