Why don't you take a look on "want to hire" section. I hope you will find a lot of post related to copy writing.Also you can try on freelancing sites like Odesk, Elance and Freelancer.
Try websites like PeoplePerHour and Guru. There is a bunch of work for (good) copywriters there, especially on PeoplePerHour. You have a good shot there because most copywriters charge $25 an hour minimum. Look presentable, write coherently and charge $10-$15 in the beginning and you're good to go.
These websites doesn't seem like they've got a good traffic flow. Even the top gigs on their writing section got just like 1 sale or less!
PeoplePerHour?? Guru?? Were you looking at the right sites? At the right sections? And numbers?