Ben Orford does some great and not too expensive crook and carving knives. I have a set and I love them, not that my carving is any good at all, but it is fun to hide away in the shed! I have one small crook knife which I got on a Woodsmoke Axe course and was I think a prototype, which has a small additional cutting edge on the back of the blade so you can 'push' in awkward bits, to compliment the main 'pull' (if that makes sense). I really like this but have never seen it elsewhere? You have to watch the old fingers though, especially if they are tired