Dave,
Welcome! Yes, I do have few (actually a bunch) of Indy cars made by Scalextric.
A few of them are still available at on-line retailers plus it is fairly easy to
strip the paint and custom paint what you want. The decals are readily available and reasonably priced. You can also usually find a number of these cars on ebay. They run well right out of the box too. All it takes is a little sanding/trueing on the tires and you are ready to go. I hope to see you at the track.
Robin