I'm going to disagree with @maximilian12 here; the power button is not replaceable due to the part pairing, but depending on what's wrong with it, it could be repairable. For example, a damaged FPC connector can be replaced fairly easily by a shop with the right experience. There are repair facilities out there that are capable of a wide variety of repairs depending on exactly what's wrong with your power button.
Unfortunately, your list of places doesn't narrow it down for a lot of us; are those counties in a state? Are you in the US? A state and a nearby city will be a lot more useful if so.