K2 has all of the K1 clothing, but for the new clothing in K2 I'd say rename "N_CommM0201.tga" to "N_CommM09.tga", "N_CommMD01.tga" to "N_CommM11.tga", "N_CommF09.tga (K1 Czerka)" to "N_CommF10.tga (K2 Czerka)", "N_CommF0301.tga" to "N_CommF09.tga" and "N_CommFD01.tga" to "N_CommF11.tga".
Doing that should allow these clothing mods to work in K2.