In-Depth Stat Tracking

Is there anywhere to get more in-depth stat tracking? Specifically, game-to-game stats. I'm looking to do predictions based on comparative opponents, but Riot's tracking only offers fantasy points and stats by week, rather than by game.

Related to that, is there anywhere that produces this data in an easy to manipulate form, for example, being able to download it in an Excel file? That would be extremely useful.

Please let me know if anything has already been published, or if there is anything in the works. Thanks in advance!