Well, people have called for different colors other than three band and black think ... think multicolored or pure white. Pure White has a connotation with the old technology. What I am saying is if they produce many units of a variation and are stuck with them their profits decrease by having stock that does not move and the manufacturer has to eat it. If they produce few units it is not enough to overcome the cost of producing a few special units (fiber manufacturing companies that supply the brush companies require a certain amount of material to make customization worth their while). Manufacturers will make the safe bet.