Yeah, what Vader just posted was what I was refering to. So there you go!
I'm not sure if it's relevant, but you can see my failed Shako mold here. The reason it is failed is because, in the third picture on the right mold part, the tube thing you see which is for the tube conections for the shako, kept breaking. I just left it. I do want to look for other things to make. I'm not that good with clay though.
Good luck with your quest anyway.