Lightinthebox is very good.
Prettyimpress is cheaper.
Try Amazon which has a number of dresses from which to choose .
A surprisingly good and cheap place to find bridesmaid dresses in Minnesota is any Debs Store. Have a great wedding!
Cheap bridesmaid dresses can be purchased from stores specializing in them, such as Light in the Box. In addition, one can generally repurpose a dress to be suitable for a wedding. One should be able to find reasonably priced dresses from ASOS or Dorothy Perkins.
There are a number of online sites that have pictures of bridesmaid dresses. The most extensive collection of bridesmaid dress pictures can be found on the Google Images site.
One can find green bridesmaid dresses in a number of different places. Bridesmaids dresses are usually sold alongside bridal gowns in bridal shops. As well, prom dresses can double as bridesmaid dresses.
You can find bridesmaid and flower girl dresses at stores like David's Bridal or even your local Macy's. You can also find great deals online at amazon.com or even ebay.com.
You can purchase formal bridesmaid dresses in the UK online from websites such as Forever Bridals, Dessy, and Morilee. You can also purchase from the United Kingdom based company Eternity Bridal.
You can find cheap formal dresses online from Charlotte Russe, Target, JC Penny, Cache, and Sears. Cute dresses re also sold at Hollister and Abercrombie & Fitch.
Most bridal boutiques will have bridesmaid's dresses as well. However, if you are just looking for a couple dresses you can always try department stores and get a formal gown to use.
http://www.ubrides.com/home.php?cat=333&catexp=333
any wedding shop
Fashionable and cheap clothing online stores would include manalive.com, jimmyjazz.com, urbanog.com, amiclubwear.com, forever21.com and lulus.com. You are sure to find trendy clothing of your liking.