Hello, this is totally off topic, but since i am a fan of open source i have found out that there is also an open source vehicle. You can order the kit and assembly it yourself. Lol that's amazing. On the site the also allow to download a cad to build your own vehicle (2/4 seats). I don't know if you can order the car that you project yourself coz i haven't read all the site, but the idea is amazing.
Take a look for yourself www.osvehicle.com