Are you in the metro Detroit area? I have a toadstool that is just floating around my tank at the moment. And I am always weeding out Kenya Trees, I have a couple nice ones that you could take. Neither of those corals is especially particular about their water quality, so I think you could add them any time. And both have thrived in my less than ideal schedule of care...
Doing a little re-arranging at the moment, and they are redundant in the tank's future.