Kayak found me a car.
Pros: After directly contacting all major car agencies and told there were no cars available, only SUV and big cars, I visited Kayak. The site showed Avis had a mid-size available. I grabbed it. Since I was worried about the Avis site and a direct call to the local office said no availability, I called the local office to reconfirm. Yes, they had my reservation. Routine after that.
Cons: Don't try last minute summer car rentals in Anchorage.