If you cant get the prismatic amulet u can use Tal Mask/Armor/Belt for just as good if not better mf and resists on helm. Personally my zon has

Tal Helm
Tal Armor
Tal belt
Titans
Storm
Raven
Nagel
Crescent Moon
War Travs
Chance Guards

Good resists and good leech. Nice setup for a zon.