If you like live music from that era you need to check out www.wolfgangsvault.com
They have every Fillmore East and West concert plus a lot of newer Indy/Folk concerts.
It only cost 29.99
a year. With it you can stream the concerts to whatever you want plus if you want to buy a concert they're only 5.00 dollars apiece.
Here's the concerts,songs and playlist that they have for The New Riders of the Purple Sage.