I've got one and just sent a smaller one off to a friend in CT who wants to make her own, too. The smaller one works well for kids and she works with kids, so is hoping to make a few. She used to work at Guild Guitar so knows a fair bit.
I bought the smaller one from a grandpa on ebay. He started out making them for grandkids, then local stores, then went *global*. Looks pretty siple and sounds great.
I think it was Art Thieme who first posted a link to this guy's site. If he doens't have plans, I'll bet he knows someone who does, or there is one in his links. He's even got a *simple* hurdy-gurdy one can supposedly make in a weekend!Good luck!