04-06 Toyota Prius Headlight ~ Left (Driver's Side, LH) | 04 2004, 05 2005, 06 2006 are these OK to buy? mine are all pitted and scratched and look like crap so I want to buy new ones...does anyone know if they are hard to install? thanks! Also, is it bad to order aftermarket ones? They look exactly the same...whats the difference?