You will probably need a donor part, because I do not think they are made any more. You might be able to get a cable with the "in car" end made, and finish it after threading it through the sheath. A bicycle shop can probably make it. You may have to attach the TB end yourself to get the right length if you do not remove the whole cable from the car. If the end at the TB is the part that came off, you may be able to get the end from a bicycle shop, and crimp it on at home.