Doutzen, here are some for under $100 that I found online at Forever 21, Nordstrom and Urban Outfitters I'm not sure how much you're looking to spend or exactly what length/style you want. H & M might have some in store as well.
http://www.forever21.com/product.asp...3214396&Page=1
http://shop.nordstrom.com/S/3055346?...=searchresults
http://shop.nordstrom.com/S/3053649?...=searchresults
http://www.urbanoutfitters.com/urban...SULTS&color=01
you also might want to try Topshop or topshop.com