As of now, you are still able to buy the game on Steam. It seems that when removing the game from the store, 2K forgot to remove all packages that contain the game, so there is still a package left that you can buy that contains only NBA 2k14. Here is the link to the package:
https://store.steampowered.com/sub/3162 ... id=4777282
Really hope that they won't patch this in the foreseeable future.