On the scale of movie-car degree of difficulty, we have the General Lee at one end and Nemo’s car way, way out on the other side, bookending all the Batmobiles and Tumblers and Mad Max Interceptors that have rolled out of fans’ garages over the years. The Nemo machine poses both engineering challenges—it’s a 7,000-pound four-door convertible with two steering axles—and artistic ones. It’s covered in ornate sculptures and trim, and hardly anything is symmetrical left to right. If you need a part, you’ve got to make it.