I can't seem to find any option to do this and can't see any threads suggesting it. As someone who prefers using an inverted Y-axis it's hard to play KSP because the look up/look down action is reversed to my usual preference - I have over 300 hours but avoid playing these days because it's difficult to switch mind-sets. I suggest an option to invert the mouse Y axis whenever mouse-look is active, so when I pull back on the mouse the view goes to the sky, this should apply anywhere mouse look works (SPH, VAB, Orbit, EVA's, etc).
