Which part is damaged? The door handle, the lock cylinder, or both?
It's very easy to swap lock cylinder wafers to match your current key. I did a write-up two or three weeks ago:
Rebuilding / rekeying a Toyota lock cylinder
A lock cylinder should cost about $5 at a boneyard. If your old lock cylinder still has an undamaged core, you can just insert your key, remove the circlip, and pull the core out with the wafers in position. It should take under five minutes (plus the hour it will take you to remove the door panel and handle if you have never done it before).
You'll need to take out your door handle, so it's a good time to replace it if it's damaged. You can get already-painted aftermarket ones on FleaBay for a reasonable price. Most of the cars in the boneyards already have had their exterior handles, so don't expect to get lucky there.