/diy/ - Do It Yourself

>>1509561
>>1509574
>>1509665

The picture basically says all I want to say.
Otherwise, ask me if anything is unclear, the questions are:
>What plastic to use?
>Is one or the other better, should I look elsewhere for another piece entirely?
>Should I use superglue for this?

(Unnecessary stuff, feel free to read if time is there:)
This is one of my first posts on /diy/, excuse my new-ness.
I didn't see a thread for "fix small shit general", so I decided to come here, since I figured you lads would know a little about plastic.
Pic related is my broken digital piano (it's cheap, but it's from 1988, and I wanted to test out playing and maybe just have a little fun on it).
I think the idea can be derived from it very well, but what plastic should I use as patch?
Should I even use superglue? (I already used copious amounts to fix a 3 plastic standoff screw-threads in the chassis of the keyboard).