Yamaha YZF 750 Parts Request

I am currently looking for a Chain Guard for my bike but without the hugger (Silver preferably tried Puig)

Also does anyone know if the rear lights on this bike could be replaced with aftermarket ones, if so could you let me know as these look terrible.

Before I purchase a set of K&N Bolt on air filters for my bike, has anyone else seen any power or drop gains by doing this and is it worth it.

Lastly, is there any hi level exhaust brackets for this bike.

Thanks