Stumbled across this site today: http://derailleurhanger.com. They ship worldwide and are roughly half price - shipped - compared to local bike shop prices.

My young bloke broke his hanger on a rock last weekend riding home back up the trail from his session with forum member 'mountainbiker'.

Got the LBS (ie, the local brand dealer) to order in a pair of replacements for the bike, which have now arrived. I enquired as to price: FORTY FIVE BUCKS EACH! For a little piece of soft aluminium!