Attached are some pictures of my grille block, wheel deflectors and passenger mirror deletion. The upper grille block is made of clear packing material that I cut to match the upper grille opening. The lower grille block and the wheel deflectors are made of flexible plastic panels cut to the appropriate shape and secured with velcro for easy removal. These are a bit rough and now that I know that they work I will repaint them for a better appearance and see about getting a clear piece of lexan to replace the upper grille block. These mods allowed me to get my personal best tank average of 36mph recently. I hope they are helpful in your pursuit of better fuel economy.
Best wishes , Vic