I'm pretty sure I've seen postings here (or maybe over on Home Cooking, not sure) about where to find a coconut grater. The good ones (counter clamp, solid stainless blades) are hard to come by. I realize there are about a million other ways to grate fresh coconut without a special coconut grinder, but frankly, they are all incredibly time consuming and make me not want to bother despite my everlasting love for really good coconut cake.
At any rate, if you're been looking for a kickass coconut grinder, you can get one here: http://shop.niwasa.com/default.aspx
Just sharing the coconut love.