Probably there are no transcripts to be released, because the speeches were largely extemporaneous.  They are described by some of the hundreds who witnessed them as basically "rah-rah", "your corporation is great, you have an important job to do", motivational speeches.  Clinton got a lot of money because, at the time, she was the most popular political figure in the United States.

What conspiracy are you thinking about?  These speeches were to scores of mid-to-upper management people, not sub rosa agreements with the boards of directors.

Republicans want you to think conspiracy.  If there were anything corrupt going on there, you can bet Darryl Issa and Trey Gowdy would be on it like flies on merde. They want your imagination to run wild.  Clinton knows that whatever she says about those speeches, the RNC propagandists will twist it like a wet towel, trying to wring out a particle of useful dirt. 

Sound cynical?  I am, and with good reason.  RNC runs on propaganda.