Cas--my good friends Alden and Cali Hackmann build hurdy gurdys in the Seattle area, Washington State, USA. They also list books and CDs as well as a lot of other fascinating info on their site, here. You might want to take a look. Are you in the states or in Europe? There is a hurdy gurdy festival held each year on the islands near their home (lots of info about that on their site as well).

Interesting instruments! Strange sounds!

Lin