My Red Book and
The Erotic Review are both good resources. You can still find ladies through craigslist even though there isn't an erotic section. Go to casual encounters, search w4m and then sort through the posts. SP's are still advertising with their service and rate info embedded with their pics (as to not get automatically flagged).
Where are you staying (i.e. downtown,south towards San Jose, etc.) and what sort of provider (incall or outcall) are you looking for, I might be able to point you towards someone.