You cant. I’d personally just get By-Art’s version repainted by an artist. Is way cheaper. You can get a nice repaint for $150.
You can make the cheap wigs look way better too by giving them a haircut and removing some hair to make it less dense. Then thin out some black acrylic paint with a bit of water. Dip the wig in that. Dry off with paper towel. The paint will get rid of that cheap plastic shine. Then just use some hairwax to style it. With a repainted head and this wig method it will look as good if not better than Nut Pizs.