I have in hardwood dowel. The poor thing isn't glamorous, but she works nicely for me and I can hold my 9 std like a pencil. ^_^ My "stylus" can be found here: [link] Looking for something you can hold without cramping your hand?
Walrus ivory is a little harder than wood but it depends on the wood too.
Every now and then I'm fortunate to locate a cache of pre-Marine Mammals Act material. This happened to be part of an estate sale of a whaling era property and among bric-a-brak in a box. The price was right.