@chancesnatcher a good trick is to put them in boiling water and hold your finger on the bent part until it's strait I know Gene Jetson had a video on it on ...more YouTube his channel is called bass resource
Get some water boiling on the stove and sit it in it for around a minuet and then lay them out on some paper towel and put them back I'm the bag real carefully.
I don't know of any. But I do know that the bend isn't all bad if it's small. I've noticed that it causes the bait to jump more when you twitch it. ...more I've caught just as many fish bent and straight.