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There's likely something much closer, but there's an alloy wheel repair shop in Kirkland that comes highly recommended by Tesla Bellevue (the service center). We had one of our Cyclones repaired and they matched the standard Tesla silver color when repainting, so I imagine if they can apply other colors. And actually, according to their site, yep! Check out Wheel Personalization under services.
And there's apparently a shop in Tacoma too. I'd guess it's around $200/wheel (based on the $175 it cost for the minor repair and repaint we did) which is a lot, but far less than buying a new set.