So I learned at my recent tire change at Discount Tire that not one, not two, but three of my 21" wheels were bent. Meh.
One week later, I wake up to a flat tire. (Details and swearing omitted.) So back to Discount Tire and they found a hairline crack in the rim (also bent). I researched, and found Express Wheel Repair, great reviews on Yelp, so I asked for a loaner wheel from Tesla service center in Tempe -- they were most accommodating -- and three days later I have the cracked rim repaired, all three wheels straightened, and two with curb-rash refinished to like-new condition. Wheel refinishing, powder coating, amazing repairs, mobile or drop-off, service. Danny (service) and Alex (technician who did the work) exceeded my expectations.
http://www.phoenixrimrepair.com
Clarification, it took three days because I still needed my car so I split the work over two visits. I'm very pleased with their service and pricing was far below any other solution I could find.