Hi there,
Any type of Qi wireless charger will do as long as the same or not more or less than the Input/Output like the original back image of Emo’s Home Station and Skateboard below.
In case you can’t find the exact one that matches the original charger, try to use not too much power and keep an eye on it for the first day to make sure it does not overheat. But personally, I would only use a charger that matched exactly.
Goodluck, Stay Safe and Enjoy with EMO…