E.M.
I had a wonderful night time nanny that is also a doula (though I only used her as a night nanny) with my second child. I recommended her to a few friends some living in W. LA, others in Pasadena and some in Calabasas. She drove to them all and was a life saver.
With my first, for a doula ONLY (no nights) and helps with birth, breastfeeding and mommy care after birth, etc I used the Lola guide and found a wonderful woman...though I forget her name.
A good suggestion is the Chapman Center ###-###-####
Night nurse Nora Morales ###-###-####