I get mine from here and there!
Mod the sims->These creators have hair I use on my sims: Hellfrozeover(
http://www.modthesims.info/member.php?u=5564), LoveTheSims0(4http://www.modthesims.info/member.php?u=22920), PhantasyGurl(
http://www.modthesims.info/member.php?u=57172), jazzy1(
http://www.modthesims.info/member.php?u=38571)
On this site, Geezy33 has haircuts for black male sims I use on my men and little boys in the male hair section:http://www.insimenator.org/index.php/board,427.0.html
Mocha from Sims Urbania(
http://simsurbania.com/index.php?PHPSESSID=1ed0c5c4244e6c5f4e2fb7e4e38a1d46&board=19.0) has some hair recolors of a ponytail plus a conversion of Fantatsyrogue's thin dreads mesh(just follow the link Mocha has if you want Fantasyrougue's original mesh)
All of these sites you have to be registered to download. Except Real sims blvd, I think since they changed boards you can now access the downloads without registering.