Super mojave is another all white snake with blue eyes (blue eyed leucisitic), so to try to get a pied with a white head, maybe cross it with a super mojave or regular mojave...*shrug*

I do my best "what if you combined..." thoughts right before I go to sleep, so I never remember them...

*edit*
I do not profess to be the best knowledge on morphs so if I'm incorrect, PLEASE someone correct me!