My boy didn't like to chew wood either until I tried colored waffle wafers from this site http://www.motherpluckinbirdtoys.com it's really easy to chip small pieces off.
Mine loves waffle wafers hung on the corkscrew skewer from here http://www.motherpluckinbirdtoys.com and of course the SS bell http://m.mysafebirdstore.com/product.cgi?group=2300&product=13676
Poor baby, hope it heals fast. Does he have cage mates that might have bit him? Anything sharp in his cage? Maybe he was chewing on the bars and got stuck?
My grey never really liked to chew wood, but then I discovered This store http://www.motherpluckinbirdtoys.com ! His fav is the small corkscrew filled with avian waffle wafers. He also likes the button crazy toy, almond stuffer and cork stuffer corkscrew refills.
Were you able to get it? I can list it for you now, if not. I will make you an account and make up a password with your email and message it to you, then make your listing, if you want:)