Change Collider Bounds at Run-time

Exactly the same as holding shift and been able to move the side of within the editor, is there a way to reposition a side (i.e. collider.bounds.max.x = x) at run-time.

 c.bounds.SetMinMax(c.bounds.min, new Vector3(c.bounds.max.x, c.bounds.max.y, 5f));

I've tried to set the bounds, however they are read-only and since this is a value type I guess I'm just getting a copy of the bounds back.

So anyway to resize say max.x of a collider at run-time?

P.S. Using collider.extents or collider.size would work, but I'd need to recenter the object to align it back to it's original alignment.

I've put up a really bad illustration of what I'm trying to do (you'll notice I didn't have a text tool for the image) :D