Trek mech hanger

So, I crashed my bike a while ago. Thought I'd got away without too much damage, just bar tape and a few paint chips. However, the shifting's never been right since - despite my best efforts at tuning the indexing. I suspect the hanger is bent and needs replacing.
Anyone know where I can get a rear mech hanger for a Trek 1.7?
Pictures added...
https://docs.google.com/open?id=0B7B-G0H-C62WOTNiNmVmMmEtNDJjYS00MzJkLWEzYzMtYTQyZGE1ZTA3NmFj
https://docs.google.com/open?id=0B7B-G0H-C62WODdmOTRkMGItYjA5Mi00NjdlLThjOGYtMzY5ZTRlYjQ4ZWZk
https://docs.google.com/open?id=0B7B-G0H-C62WZjA0Nzc0NzYtNzRkMy00MDhhLTk0YzAtMGYwZGQyNDgyMzE5
Anyone know where I can get a rear mech hanger for a Trek 1.7?
Pictures added...
https://docs.google.com/open?id=0B7B-G0H-C62WOTNiNmVmMmEtNDJjYS00MzJkLWEzYzMtYTQyZGE1ZTA3NmFj
https://docs.google.com/open?id=0B7B-G0H-C62WODdmOTRkMGItYjA5Mi00NjdlLThjOGYtMzY5ZTRlYjQ4ZWZk
https://docs.google.com/open?id=0B7B-G0H-C62WZjA0Nzc0NzYtNzRkMy00MDhhLTk0YzAtMGYwZGQyNDgyMzE5
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For those of us without a full workshop: Handy Hint
Don't just grab and twist and man-handle your mech to get leverage, insert the short end of an L-Bend allen key into mech retaining bolt and manipulate the allen key, stops you bending the mech instead of the hanger.
FCN4 - Fixie Inc
Good advice. I've replaced the hanger but the shifting's still not right. Hmmm....