OutlanderTiberius

Hi, so I'm new to this kind of stuff but yeah. I need help searching for covers to songs that are in the anime Grisaia No Kajitsu. I'm helping a friend out with his DDLC mod FotLC, and he is in need of the covers of Apple Clash, Deadlock, Dog Days, Grape Drops, In The Air, Kasabuta, Katzusoko, Mayoi no mori, and Warratte Itakute. All officially made by Junpei Fuj. He cannot release the final Chapter until he has these covers. Please help, I'm legit like scouring the internet in search of the covers. Some help would be most appreciated.