Dented my lower runner :(

Sadly I have hurt my baby. I was trying to squeeze into a right hand turn land and went up on the curb slightly. It ended up putting about 2 feet of fairly deep scratches and paint transfer and a decent sized dent on the lower runner. Luckily since it is way down on the bottom, it isn't super obvious.

I was just wondering how much it would cost to get it fixed? I assume I need to get the entire side panel replaced since it is all connected? Is that something you can purchase online? or is it possible to somehow get the dent fixed and the gashes smoothed out and painted?