As a BAR warrior that follows RZ, you could look into the Ogre cultural smithing plate recipes, it's slightly inferior to planar, and will probably cost a lot(assuming there's Ogre smiths around to begin with), but it is an option.
Example here:
http://www.eqtraders.com/items/show_item.php?item=7363
There is gear for Agnostic warriors, but in general the enchanted, non-imbued versions of cultural equipment is slightly inferior(usually some minor stats missing) to enchanted imbued versions(which are deity-specific).
Edit: Although I don't know how much of this stuff is actually working in-game.