There are plenty of people who like the thought of a Mustang-branded electric SUV, apparently. Ford has confirmed to Roadshow that the Mustang Mach-E First Edition is sold out in the US. If you wanted to be one of the earliest of early adopters for the EV, you're out of luck. The automaker didn't say how many vehicles that represented, but Ford previously said that battery supply constraints would limit overall Mach-E production to 50,000 vehicles in the first year of production. Given that the First Edition is likely a small portion of that number, you may have a hard time spotting the special-run car on the road.