I make my own...

I can combine differnt colors together, just tie them in at the same time/same place then spin them together between your thumb & pointer finger. The tighter you twist, the more random the pattern it makes.

I have done 3 color mixes that work just fine. Also mixing medium with ultra will give you different looks. Some of my favs - black med./pearl cactus - peacock med./white ultra - tobacco brown/black...... just mix whatever you want.