There is an the issue with the "cheapskate" market segment in that it has to
more than pay for itself. That is more than just the cost of the kit; many won't install it themselves so there is that cost plus paint too.
I'm afraid the real motivator for this sort of thing is Bling and those customers are willing to fork over crazy money for that.
Maybe the ticket is to make Bling that is also aero efficient.