Here are a selection of some links that you might find useful

Pure Jewels
Build your own wedding ring. Select the metal, change the width and even the thickness and make your dream product. It will be personal, unique and made especially for you and delivered as you choose it in 14 - 21 working days.
http://www.purejewels.com/

Shop.com
Hundreds of merchants, thousands of brands, millions of products, just one account. For party supplies and much more!
http://www.shop.com