As Richelle as said, these types of brand name products are only sold through the brand holders authorised distribution channels, they are not something readily available through a wholesale platform.
Liquidated stock will give you some options, however you would most likely not be able to customize the load, meaning that you would get mixed brands, and they would not be current season. Will be anything from just out of season, right through to a few years old in most cases, but the prices should be good.
Just make sure you look at new overstocks, not customer returns, shelf pulls or any other category.