New Star Guardian Splashes. Where to get them in Riot Games/League of Legends folder? ;-;

So like when new skins were released and I really liked them, I made them my desktop wallpaper. Only way I could do that is by folder called lol_air_client (RIP, you will be missed) So, what I guessed was that Riot either uses images from online OR saves it in a folder when it is patching. Thus I want to know if anyone of you know where the Star Guardian splashes will be :D Thanks for help and I know it maybe wrong but we need some kind of saver where Riot Games stores all the splash arts :( Its unfair to wait until people upload high quality unlike 600x... because they are 4th of my screen :(.

Thanks to anyone who tried to help or even if had time to say no :D Still waiting for Star Guardian