dog travel crate (Penryn TR10)

Big ask. Please would anyone have a medium sized crate that is for the back of a car. Either metal type with a sloping front or the plastic type that fits across the car with the door facing the boot, like the Furplast Atlas. My puppy gets sick in the car and we're trying to help him feel safer and less anxious. I've bought a airline travel type one but it won't fit in the car as the door is at the one end. Can anyone help?