I'm trying to re-create this graphic - not this actual one - different contours etc.. as a vector. None of the brushes I have found end up looking like this. Does anyone know of a good brush for this or a technique?
That artwork in vector format is going to be a real challenge. There are ways, but it would require creating a spatter brush ( or similar ) in Illustrator. Not sure why you are asking about vector art in Photoshop which is a bitmap program.