Check any party store in your local area and even Walmart would be a good start. Online websites would be chicoparty.com , partypail.com , ezpartyzone.com , bestbabyshower.com
For a baby shower you may need: decorations, cups and plates, favors, game ideas, banners, food and drink, balloons and cakes. Try looking here: http://www.babyshowerstuff.com/?gclid=CLWr-_DBv6kCFQRP4QoduknAfw