Depends how fussy you are I guess, my local paper still has thinly veiled adds for prostitues in the classifieds – I doubt they’re aspiring super models though.
I’m lead to believe (by media) that most would either supply you with cocaine or at least be able to put you in touch with someone.
In my experience most people know someone who’s a bit rough and ready who could introduce you to the criminal world, it’s not as risky as you might think to try to find a dealer, they’ll either sell to you, or think you’re undercover police and run a mile. When I used to take drugs it never took me more than a day to ‘score’ in my experience there’s only really three types of dealer, 1) sells weed and nothing else 2) sellings anything but heroin 3) sells heroin, they get more cagey the higher the number.