I would make an extra long version, and literally glue the 2 ends. Use wax paper in the mid section to keep that part from gluing itself together. Turn the entire blank down to the size you want. If you are doing one like Hunt Carve, go ahead and cut the O ring grooves, and the tenon end. Have it all ready turned before cutting off the glued up ends. Will it work as good as wood? I don't know, it should, but I would guess the sound might be a little more crisp than wood.
Marvin