The good thing about this particular Yoda build is you can cut away the chin area to help to create an open mouthed version with some scratch built teeth inside. I've done this in the past and it looks very effective.
I'm going to try and find out about the fabric Ikea uses for these drapes that I used to make this costume as the texture is really good... I just don't want to keep buying the expensive product just to strip it appart... I just want the raw material.