Try a chunk of moose antler. I buy mine from this gal:
1 1 Piece XXXLARGE Moose Chunk o1pxxxlmc57 by WSPuppyeyes on Etsy
She has other types as well and you can contact her, tell her your dog's size and chewing habits, and she will make a safe recommendation for you.
Huxley has had his moose antler chunk for over a year and it is barely worn. The shape is nice because he has to gnaw on it in such a way that I don't worry about broken teeth.