I used  about 4  layers.

top layer is a FIlter>sketch>photocopy of the original image....  layer blending mode Multiply.
middle layer(a).  Image> adjust> poterize> 7 levels.. layer blending normal   opacity 30%
middle layer(b).  Image> adjust> poterize> 5 levels.. layer blending normal   opacity 50%
Background layer, original image...

 cheap nasty but somewhat effective, it won't look like a flash re-trace but meh...