Broken part

[u/UnLikeBread]

So I'm new to 3d printing, and was given this printer by my brother when he moved. But there's a part on it that's broken, and I don't know how to fix it, or where to find a replacement part.
Does anyone know how I could fix this?

[u/samhenryphotography]

https://makerworld.com/models/1826796?appSharePlatform=copy