Can't answer you there, but I just read on
<sharp intake of breath> another website that amongst the traditional instrumentation of Polish folk music are such instruments as dulcimers and hurdy-gurdies. It's not every day you see examples of these. Or is it?
URLClick on the artist profiles and I think there are a few MP3 files to listen to.
edit: Yes there are, but I think they want you to buy the CDs. I like the song on the page I've linked to above. Others may be in other styles, but I am yet to investigate further.
Perhaps a few searches on youtube might yield something.