I made something for ArtisticFangirl (and everybody else who is interested):
This is the base body shape I will use in the new SP-Studio as an 4KB svg file. Free feel to use it as a base for your own drawings. Since I guess you want to change the eyes and feet anyway to make them look closer to the show you don't need to give credit to sp-studio.de every time, since this is just the very basic shape of the characters. But I hope it helps you a little bit with your own artworks.