Bilabials and Saber Teeth

I began wondering this morning if what I have always assumed was /m/
in Asha'ille really is /F/ instead (long-legged m, the labiodental
nasal). The native speakers of Asha'ille have saber teeth, which, now
that I think about it, would make bilabials particularly difficult for
them.

So where does this leave me with /p/ and /b/? Do you think /p\/ and
/B/ would be easier to pronounce? They're still bilabial, but without
direct contact of the lips.

Does a sound between /B/ and /f/ exist? That is, I believe this sound
I'm toying with is a labiodental friccative with *no contact* between
the teeth and the lower lip.


--
AA