A couple of CD's I have sound like what you are looking for. One is call "The Pizza Tapes". It is Jerry Garcia, David Grisman, and Tony Rice playing together in a home studio. It is a little raw but it is definitely live and unedited.The other I can think of is Townes Van Zant "Live at Old Quarter". It feels like you are sitting in the bar. Townes wasn't at his best, but I enjoy it.
Al
Al