Unfortunately there's nothing really for the base models, only the ST, at least in the USA. The best route to go is to swap your bumpers, front and back, with an ST model and then you can add whatever ST specific lips, etc. that would fit on those. So yeah... base models, you usually just ST swap your body parts and now you buy ST parts. With a Sedan though that back bumper may be tricky to find something for. I can't say for sure as I don't have a Sedan, but I know in Europe there are quite a few variation on the base model that imho look better than what our base model got here in the USA. Shipping would be terrible though, I imagine.