I don't know of any pep files for one specifically but the berzerker pep minus bones is ok or you could sculpt one. Take that trapezoidal shape of the wolf bio's mothguard and turn it upsidedown then shrink some of the features like the dome flares, browes, cheek bones. Next make the long taper on the dome not so steap or high and shrink the whole thing a bit. I'm planning on sculpting one taking these things into account too, but that'll be a bit after my current one's are done. Let me know and see what you do. I'd be intesrested in seeing it.
Oh btw, just an opinion but sculpting and making a mold is no harder in my opinion than doing some of the pep files.
ppl just think it's hard to sculpt. practice is super important so never be afraid of messing up previous work since fear prevents progression. Mine has become so much better every time I take a big risk. I'm making headway and might have some time to sculpt a female if you want. Might just do it anyway.