Go to the Jefferson Motel in the Jefferson area of Los Santos. Go west to the split in the road then go on the road to the left. Immediately afterwards you can see a lot on the left decorated with triangular banners and surrounded with a fence. This is the Coutt and Shutz dealership. A Tampa will be in the lot, along with a Clover and Perennial. If none of those cars are there, drive around and the cars will spawn there.