Try the "Pack-a-bull", "Select-a-bull", or one of the Backcountry kits from Bugling Bull game calls. They come with a really easy to use external mouth piece. With some practice you can get really good on them!
I have a couple of Elk nuts bugle tubes with external mouth pieces. I do not use them any longer. If you are interested I can send them to you for $20.00. That should cover the shipping. I have mouth pieces that have never been used. Let me know if you are interested.