Try Nylabone ... Their indestructible, non-edible series. Chunk has two ...
He has had this one since the first week we got him (about 10 months ago) and it's still going strong!
My apologies! My links were not acceptable so here are new ones! ... here is the ones Chunk has:
This one is his fav! We've had this one pretty much since we've had him ... about 10 months! He's put a dent in it but it's still going strong! I learned about these from my father-in-law ... he buys them for his pitbull. And he tears through EVERYTHING!