Determining which derailleur hanger is compatible with a frame When your derailleur hanger needs replacing, is there a good resource for matching frames to hangers?

Mine was recently bent, so I had to dig through some websites and compare pictures of the hangers to my bent unit. Surely there's a better way. Any ideas?
Wheels Manufacturing has a feature to search by brand for their hangers. Just one company of many that produces replacement hangers.

http://wheelsmfg.com/products/derailleur-hangers.html