What sites have people found best for finding folk songs in ChordPro format? Does anyone subscribe to any of the subscription sites?

Am I missing something in the Digital Traditions database? When I search for songs I do not see them come up in ChordPro format.

I just purchased OnSong App for iPad/iPhone. (Wow! What a great app!) I am starting to work on building up my song library in OnSong so I do not have to carry heavy songbooks around!

Though I do not currently play an instrument, as I import songs I would like to import them with guitar chords when available so I do not have to laboriously add them in when I start playing again.