You can make a predator toneboard type elk call.......similar to a open reed coyote howler. You would just have to mess with your measurements in the toneboard, and your reed material to get something high pitched enough for your liking.
I have not ever seen a bite style set of toneboards made out of wood, but I'm sure it can be done. I've seen lots of crow call sets made out of wood. My concern would be, biting on the wood over and over could cause the wood toneboards to have stress on them that would not allow them to stand the test of time.
Please share your ideas while you work on this project.
Vince