Can't comment on Space as it is not release, but assuming it is the same as all the other Factors that I have owned… you CAN power them with a OneSpot… use a OneSpot "L6" conector to get the right connector size.

The issue with all this is that the Factors need isolated power, so you can not chain a factor with other pedals unless you are using an isolating outlet supply…. OneSpot is not isolated.

there are other power supplies that will work, but obviously Eventide only support / recommend the official ones as they know they work and will not damage the box.