Buyers Weigh the Prospects for Shuttered or Endangered Car Models; Where Can You Find Parts? Like many drivers, Edward Suchodolski is facing the prospect of life with an orphan car. The 43-year-old construction manager bought a sporty Pontiac G8 GXP in March, about a month before General Motors Co. announced it would discontinue the Pontiac brand. While he loves the car for its power, its handling and the fun of shifting its manual transmission, he is starting to worry about the future. The anxiety is just enough, he says, to cut into his enjoyment. I find myself driving it less,"...