I am struggling to find these files, but some other posts here imply they do exist.
Usually these are added to kobo devices via the "Sync" OTA feature
eg https://www.mobileread.com/forums/sh...php?t=361450#4
Usually these are added to kobo devices via the "Sync" OTA feature
eg https://www.mobileread.com/forums/sh...php?t=361450#4