You could try a coolaroo for him. Not a whole lot for him to chew on with it. With regular beds Harlea will eat them if I leave the tags on them, but if I cut them off she leaves them alone and just snoozes on them.
My dogs have Snoozer beds, but I got a coolaroo, thinking they probably would not use it 'cause it's not stuffed. Well they loved it and still do. I got a large one, because there's four dogs. They either take turns,or sometimes there are 3 of them sleeping on it. They also love to roll on it and scratch their backs. They have had it since last winter and they love it! It still looks new!