Toyota runs dealers on allocation. Subaru allow you to order a car to spec. They make the "twins", gr86 and brz. You cannot order the Toyota. You have to try to find what you want being built or on a lot already and contact the targeted dealer to buy it. You can order the Subaru and wait 6 months for it to be built to spec.
It's about 50/50 based on some quick research of Toyota, Honda, Kia/Hyundai, gm/chevy, Ford, Nissan. The first 3 are almost entirely allocation and don't allow custom orders. The last 3 support custom orders on their "regular traffic" models but not as much for their halo cars .
