Psst, I am very sorry if the links are not allowed here but I don't know where to write about that.
If it's the new information then in 2019 the artist that drew the illustrations for 'FillyMagazine' uploaded some of their work: lots of Filly related pictures from comic panels to illustrations with close-ups.
example - (https: // elenarockinger.com/portfolio-item/filly-comics-2014/)