Black color wax should cover most of the scratches up for you, use multiple coats. And there has been lots of talk about frame-sliders lately around here, pros-cons...but I put some on mine as cheap insurance for little incidents like the one you just had.
Anyhow, real bummer that she got a little scuffed up before the first oil change, but a few war wounds just add some personality, now its unique and truly yours - a one of a kind if you will...lol.
Check Ebay for plastics, you will eventually find a good deal. Your bike still looks great, and things could have been worse.
stay safe