There is one in here I havnt tried. Gonna have to give it a listen.
https://www.cakewalk.com/Support/Knowledge-Base/2007013311/10-Microphone-Placement-Techniques-for-Acoustic-Guitar
https://www.cakewalk.com/Support/Knowledge-Base/2007013311/10-Microphone-Placement-Techniques-for-Acoustic-Guitar