Every H9 supplied by Eventide comes with an Eventide power supply in the box.
Usually, you would notice its absence when you first opened the box. It is remotely possible that one might be omitted, but vanishly unlikely that two would be missing.
For sure, I’ve definitely misplaced them somehow. Last question: I bought them in Japan which has US style electric power. Would the power supplies have fixed prongs, or the slide off adapters?