Portal 2 Chell in .stl format

Hey guys, i have an odd request. I need a 3d model of Chell from Portal 2 in .stl format, commonly used in 3d printer programs. I intend to use it for a 3d printer project, but i suck at any kind of modelling, and the program i have is damned near impossible to use, but the 3d printer requires any models be in .stl format. (EDIT: converter won’t work, i used all the google-fu in my collection and i found not a scrap of useful conversion software.) Thanks ahead of time.