To make anything axanthic, you need at least het axanthics. No other way to do it. Axanthic is a recessive gene, it takes 2 copies, one from each parent to make more visual snakes. It doesn't matter if it's just axanthic, or axanthic and another morph, it still takes 2 copies of the gene to make more.
The shortest way, and they way with the best shot of making more is to buy 2 visual animals to breed. The next best chance is to buy 1 visual and 1 het. The longest shot, which is also the cheapest, is to buy 2 hets.
Gale