The closest thing that you will come to what you want is this:
What you do is go to "Z" page on World of Ball Pythons, and see what the morphs needed to produce "Z" are, then plug them into the Genetic Calculator.
Here is a simple one:
The Bumble Bee: http://www.worldofballpythons.com/morphs/bumble-bee/
So now you know that you need a spider and a pastel to produce a bumble bee so you put them into the genetics calculator:
Genetic Wizard 3.0 calculations by
You can then look into other morphs that include the pastel and spider genetics and compare them to other options.