Have you tried these?

http://bgr.ee/LINKS/l_240.html

http://bgr.ee/LINKS/l_250.html

http://bgr.ee/LINKS/l_250.html#lyr

http://www.runet.edu/~bluegrass/songlnk.html

http://www.accessone.com/~rwadams/h/

http://hot.virtual-pc.com/guitar/frames10.htm

http://www.greene.net/~jack/country/jack13.html

http://www.flash.net/~djka/countrymidi.html

http://www.banjo.com/BG/BG-Midi.html

http://www.aisp.net/country.htm

http://www.yahoo.com/Entertainment/Music/Computer_Generated/MIDI/

http://www.epix.net/~lesley/folk.html

http://www.jg.org/folk/info/artists.html

http://www.yahoo.com/Entertainment/Music/Artists/By_Genre/Folk/