I took a shot at the great Cowgirl in the Sand.

Neil's my favorite acoustic player too..(and Hank is the coolest acoustic on earth). Others are Tony Rice, Stephen Stills & Clarence White.

There are so many factors to Neils acoustic tone...

Top $ instruments & electronics, playing style (seventies herco strumming near to the bridge VS later clawhammer style according to the song he is playing), tuning (downtunings, modal tunings, "off" standard tuning 'cause of tuning by ear...),...
I still think you can get close when copying his playing style and using a quality guitar. 

My ears are not good enough to hear differences betweed the wood used (mahogany back & sides vs BS back & sides, German spruce top, Adirondack or Sitka spruce top, ebony or rosewood fingerboards & bridges, scalloped, tapered or straight braces, string brand and string gauges, etc..).