At another site I am involved with members make their own via www.makestickers.com
They settled on an oval of a certain size and each order their own. This is the oval they use: http://www.makestickers.com/customize.aspx?tid=7689
but there are others to be chosen from.
They use the same basic design but customize the top portion to include their names or other info. They make them in a variety of colors and one sticker costs about $10.00
Here's one I just tried out: http://www.makestickers.com/design/1...wpf3mm?SKU=103
Here are some examples of their stickers: