Seeing trumpetmidget's post reminded me that there's a website belonging to a Brazilian woman named Katia Karvalho, who makes clay figures. I'm not sure if the instructions are in English or how detailed the photos are, but it might be worth a try. Here's a link to her site:
There's also a site for a Latin American arts and crafts cable network called Utilisima. Their website used to have some good cake toppers. Their address is
Go to the section called "pasteles" (cakes) and click on whatever looks interesting.