I tried to get my hands on the Little Busters PS3 assets. However, they are encrypted in .sdat format and after a lot of Googling, all I could figure out was that you apparently need a modded PS3 to decrypt them. Unfortunately, I do not even have a PS3. T_T
So, unless we can find someone who has the means to decrypt .sdat files, obtaining the assets may be difficult. I still have the sdat files if anyone with the technical know-how wants to try it.