I once stenciled a pair of shoeshttp://www.craftster.org/forum/index.php?topic=108463.0
I think the eye of the girl is not as tiny as the beatles. I used a very sharp pen I use to do my homework, I use them a lot and it stays.
I don't know if you could find the same mark i USA, I found a pic: http://www.manipapel.es/graficos/img_mini_imagen/v7todos.jpg
I cannot wait to see the result, good luck!