At Ultimate Looks you can find wigs and hairpieces as well as hair extensions. You can find brands such as the following:
Amore
Dancing w/ Stars
Easihair
Envy
Estetica Designs
Gabor
Gabor Basics
Hairdo
HairUWear
Henry Margu
Incognito
Jon Renau
Noriko
Put On Pieces
Raquel Welch
Rene of Paris
Revlon
Risque
Simply Beautiful
Tony of Beverly
and lots of wig accessories and hairwears.