
What you have there is a SC58. The rear hugger, and a front fender extender, are essential in keeping most but not all of the road fling off. Not keen on the idea of a radiator guard, some designs I've seen restrict air flow which is counter productive to cooling and they tend to cost more than a radiator repair. If you must, you must but while you're there remove the radiator and check, repair as necessary and give a goodly coat of Hammerite to the radiator fan bracket, clean up the threads of the three screws that secure the bracket and re-assemble using Loctite 243 medium strength threadlock.
The number one cause of radiator fails I've heard of are the result of failed radiator fans brackets.