Auto World. They make them new now in several different versions. The first one I saw for sale was at a Hobby Lobby. Prices vary of course, but expect to pay around $100. There's usually a handful for sale on eBay. The 13&1/2' track that comes with it should be about 20&1/2' long to be a scale 1/4 mile. I extended mine to over 30' because the cars are much faster (scale-wise) than real life and I wanted the cars to take a bit longer to reach the win light.
