A few of my favorite places to find these are as follows:
Urban Outfitters
http://www.urbanoutfitters.com/urban/catalog/category.jsp?id=W_KIMONO
Tobi
http://www.tobi.com/search?search_term=kimono
Free People
http://www.freepeople.com/index.cfm?fuseaction=search.results&searchString=kimono
Nasty Gal
http://www.nastygal.com/clothes-outerwear-kimono?gclid=CO_ozNmmiL0CFaVxOgodMQwAvw&seg=1
Kimonos can be found from prices typically $20 and up. This spring trend is worth a try!