For you to have better odds of producing a BEL, as was already said, you would need one or both parents to be BEL. Mojave is one copy of a gene with the other copy being "normal". A BEL has 2 copies of that gene or that gene and a related gene on the same allele (like lesser).

Try the morph calculator on world of ball pythons website if you want to experiment with gene combinations. You will want to keep your current female for 1-2 years to allow her to grow before even purchasing a male.. Males take less time to mature than females do.