Getting palmata will be almost impossible, a better shot might be seeing if anyone brings in Isopora palifera or cuneata from the Indo-pacific. It can grow in the same elkhorn form as palmate but is actually legal to own though not imported very often if at all. As to the other elkhorns in this post I see two different Montipora's; hirsute (a weed in my tank that nearly took over) and capitata (Appleberry Elkhorn).
