YAYY!! That's wonderful to hear that things are working out so well!
Yeah, I think him having a phone book ought to help curb his chewing other things a bit. If you have a Petco near you, they have a few toys that I'll list that my babies LOVE!!
The Nut Knot Nibbler comes in two sizes, small and large. It is at Petco (and I've seen it at other pet stores, too), and I have yet to have a bun that doesn't enjoy chewing the heck out of it!
Then you have the
Small Animal Kingdom Ferret Fun Ball & Wagonwheel toy that you can find at Petco in their ferret section. The wagonwheel, in particular, is another toy that I haven't encountered a single bun that didn't like it. The cool thing is it also comes with a ball, for those buns that like nosing around balls.
Petco also has the
Small Animal Kingdom Rabbit Maze Ball. Yet another universally-loved bun toy, though larger buns (I would say, above 8lbs) have a hard time getting their muzzle in the holes to pick it up and toss it around...but they still love nosing it around!
Then, you could also go with something like
Small Animal Kingdom Straw Mats. Most buns love to chew them, though Fiver's an exception to that. I think his not wanting to chew them is more attributed to the fact that they cover his ramp, though...and he possibly recognizes that if he chews them, his ramp cover goes away...hehe! (I don't have any other buns that need ramps...he was just afraid to come back down from the top level without one.)
Let's see...what else...
Newspaper in a cardboard box!! As long as the box has very basic writing on it, no sticker-type labels, and the tape has been removed from it...it's totally safe for Simon to chew up and destroy. And the newspaper...he'll LOVE shredding it! And if you put a few crumpled-up pieces in there, he'll love tossing them around. You can even hide a treat (like a raisin) in some of the crumpled-up newspaper pieces. That gives him something to work on.
Another thing my buns love to work on...regular ol' brown lunch sacks full of hay and a few treats, tied shut with sisel twine (which is WONDERFUL to keep around). Heck, you can even knot up the sisel twine into a little ball of knots, and he can work at chewing it.
All this stuff is perfectly safe, and you wouldn't have to watch to be sure he doesn't do this or that. Those are the only kinds of toys I buy my crew, since in having so many, I can't worry about if they're doing this or that to their toys. Not to mention, it's not true fun if you have to police what they're doing!
Enjoy!