Which stores have you gone to? If you can’t find them in stores, you can certainly find them online.
And yes, Need for Speed is still coming out with new games. I believe a new one is coming out in a week or two, called “The Run”. My favorite NFS games are Shift, Underground, and Carbon. Also, if you are getting an NFS game and want more cars that didn’t come with the game, you can go to nfscars.net and download specific user-generated cars for your NFS game. That’s how I get all my cars.