Looks like someone bet me to it. Anyway, here are a few Benders fics:

http://irnan.livejournal.com/2081.html
Summary: ...Well, trudge, actually. Stagger, even. Two days spent locked in a cage do strange things to your legs. And you're not on the road either, but ankle deep in real Minnesota mud. - coda to "Benders"

http://www.fanfiction.net/s/2937071/1/Rumble_Car
Summary: Kind of an alternate 'Benders' type short story.

http://www.fanfiction.net/s/2805156/1/You_Pick_the_Animal
Summary: Inspired by 'The Benders"...what if they had decided to hunt Sam instead of trying to kill him?

http://assignations.org/spn/familyways_index.html
Summary: (AU from the Episode The Benders) The Series as a whole is rated NC17.