Enhance Muffled Speech for Legal Clarity

I need approximately one minute of muffled speech from an MP4 recording made audible. It's barely audible on an iphone and I know the timing. It's two low voices under some louder speech and music. Key... (Budget: $250 - $750 USD, Jobs: Audio Editing, Audio Engineering, Audio Mastering, Audio Processing, Audio Services, English (US) Translator, Research Writing, Sound Design, Sound Engineering, Voice Talent)