All I've found have been a few links to recaps and such to a debate from the 12th of March in Chicago. One of which is here:
http://chicago.decider.com/articles/bill-maher-and-ann-coulter-debate-at-the-chicago-t,25026/
If I find a complete video or a transcript I'll let you know, which I hope you will do for me if YOU find one...