HI,
I'm Beeloo, Music Producer, Sound Designer, & Audio Editor, i believe i know exactly what are the rules for submitting audio files for audiobook sites, as i cooperate with many audiobooks websites, and its my daily work,
I can Edit, EQ, Boost and the most IMP Meet the specifications perfectly and professionally, in the estimated time.
You are welcome to contact me and discuss more details.
Regards.