It's imposible to enter the FS without using SEFP far-plugin & XS++ (or PhoneXS)... So you can't get access to the drivers without those tools.

I have k310i, it has ident camera driver. I posted the thread about editing cam. drivers, so, maybe, there will be any result...
Acoustic... You can port in any acoustic driver from any SE phone... But I recommend to get the "Smell_U_Later" acoustics...