Source of sheet music

Hi All,

Whilst doing the LOA programme, I find the section I am racing ahead on, faster than any other, is the music theory. I intend to write songs when I am proficient enough but for now I would be happy with a good source of sheet music. I don't literally mean sheet as in 'piece of paper' as an online source would be fine. Most YouTube videos use a kind of tablature which doesn't really sit well with me. I much prefer music notation as supplied by David for the study songs. Does anyone know where I can learn some popular harmonica tunes from music notation? An example I want to learn is 'Stone Fox Chase'?

Thanks,

Mark.