I need to replace the blinds on my bus (United Window Fashions - which appear to be out of business?). It looks insanely tight to be able to install new mounting hardware up inside the valances. Has someone found an easy way to do that? My kids said a lot of cold air radiated from the windows when they were sleeping so I was thinking about honeycomb type blinds for insulation. Alternatively, how hard is it to remove and replace the valance. I see pictures of in-process remodels, but does anyone have a "step-by-step"? Thanks!