Me too, I also need one...I work with unity
Unfortunately, i have no experience in Unity. Are you an artist?
You can say, I am learning pixel art..... My art is not so good. Actually I am 12 years old so I can't buy a lots of time with my studies...
Let's see , I may help but the quality of the work might not be satisfactory.
Here is one pixel art I have made.
It is a player box with Moving and Idle animations.
This is a gif.
If it is satisfactory to you then I might help...But GMTK jam is about to end...So I will not be able to make pixel art for that.