Is there such a thing as a mold or cutter set for making fondant letters?
Thanks!

HI there, there are lots of different letter cutters on sale. Here are links for you to see,

These are from FMM

http://www.globalsugarart.com/cat.php?cid=758&s=&name=FMM%20SUGARCRAFT/Tappits

This is from JEM CUTTERS

http://www.globalsugarart.com/product.php?id=18901&name=JEM%20Alphabet%20Set

And these are from Patchwork Cutters

http://www.globalsugarart.com/cat.php?cid=782&s=&name=PATCHWORK%20CUTTERS/Patchwork%20Cutters%20Alphabet%20and%20Numbers

HTH.

Wilton makes some and you could use alphabet cookie cutters, but they are more cartoonish.
The tappits and cutters from the links above make nice perfect numbers and letters, but watch some You tube tutorials to get used to them. They take a little practice and can be frustrating at first but once you learn it you'll love them!