Stretch Colliders when changing resolutions ?

I've just started building an android 2D game, and right now i'm facing a big problem. Well, I've made a background with Photoshop and import it to unity, And made colliders on the sides of the background to act as a wall, And it worked, but only for one aspect ratio And I am making a game for Android, And I have bunch of different resolutions & Aspect ratios. So Is it possible to stretch my colliders when changing resolutions ?

Image of the aspect ratio i built the colliders in : http://i.imgur.com/jmMHfDs.png

Image of other aspect ratio : http://i.imgur.com/kGBh6aD.png