Seamless Dialogue Audio Matching

I have several vocal sessions recorded in different studios that need to be blended so they play back as one consistent track for a podcast-style audio book. All takes are in the same language, yet the room tone, mic characteristics, breathing, dead air, and overall ambience vary noticeably.

Please let me know your estimated turnaround for roughly twelve hours of raw material and attach a sample containing a sentence or two from at least 4 of the 6 files I've uploaded. Ideally, I'd like every take to sound like take 12.

tx