Squeaker,
Ok, I'll give you a great link to all the stencil company's you'll ever want to find. When you click on the link, on that screen, key in "tile" in the search box and you'll come up with several company's that offer tile stencils. Heart of the Home and LA Stencilworks have good ones, ranging from $9 to $22. All of them have more than 1 tile. You'll surely find something you like there. Did you also know you can use joint compound, thinned with a little water, for your tile? You put on as much compound as you want the tile to be raised. Let us know how it turns out!
Laura
http://www.stencilsearch.com/links.html