Does anyone know the progression of chords (baseline) for the sweater song on piano?

I am trying so very hard to find some sheet music or notation for Hedley's sweater song on piano. There is absolutely nothing except for this!! (which has bad sound quality) http://www.youtube.com/watch?v=AMPrkIH4r2k my friend has the top part for the piano (the melody) and i am in charge of getting that classic guitar part onto the piano... i just dont know what the notes are! if ANYONE knows anything please post!!!