At least here in Europe, they are using the same plug for charging as everyone else, so any other car can charge at a Tesla wallbox (and you can buy your wallbox by any supplier).
If you can do basic electrical wiring, you may still need to get a permit and have the change inspected. What exactly is needed is highly jurisdiction dependent.
If you are not handy, it requires hiring an electrician to make the change (~$100-500)